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206 Cards in this Set
- Front
- Back
Skeletal system components |
Bones Cartilage, ligaments, and connective tissues |
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Skeleton functions |
Support, protection, movement, storage, hematopoiesis |
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Long bone |
-Greater in length than width -shaft with heads situated at both ends -mostly compact -includes all of the bones of the limbs except for wrist, ankle, and kneecap -plate fuses or ossifies at "bone maturity" and is then an epiphyseal line |
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Flat bone |
Plate like Has 2 thin layers of compact bone surrounded by a layer of spongy bone |
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Short bone |
Width and length about the same |
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Sesamoid |
A type of short bone within a tendon (patella) |
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Irregular bone |
No real category (vertebrae) |
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Diaphysis bone |
Shaft, primarily compact |
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Epiphysis |
Ends of long bone, covered with articular cartilage |
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Metaphysis |
Neck |
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Epiphyseal plate |
Growth plate, the site of growth in length of a long bone |
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Osteoblasts |
Produce new bone, make matrix |
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Osteocytes |
Mature bone cells in lacuna, maintain matrix |
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Osteoclasts |
Reabsorb or breakdown bone. Make protons and enzymes |
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Osteoprogenitor |
Stem cell whose divisions produce osteoblasts |
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Tensile strength |
Made by collagen fibers |
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Compressive strength |
Given by hydroxyapetite (Ca10(PO4)6(OH)2) |
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Removing collagen |
Makes brittle bones |
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Removing minerals |
Makes overly flexible bone |
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Compact bone |
Dense, more matrix, less space |
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Lamella |
Collagen arranged in a pattern. |
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Osteon |
Structural unit of compact bone |
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Spongy bone |
Cancellous, less matrix, more space |
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Bone struts |
Trabeculae |
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Diploe |
Flat bones |
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Woven bone |
Random arrangement of collagen fibers. In fetal development |
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Lamellar |
Mature bone. Collagen fibers are parallel to each other and at angles to other lamella |
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Inrramembranous bone growth |
Bone development occurs by replacing membrane with bone |
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Endocbondral bone growth |
Replacing the line cartilage with bone |
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Outer connective tissue sheath |
Periosteum |
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Inner cavity sheath |
Endosteum |
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Chondroblast |
Cell that produces matrix |
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Chondrocyte |
Mature cell in space "Laguna", makes matrix |
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First stage of bone growth |
Hyaline cartilage model |
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Second stage of bone growth |
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Third stage of bone growth |
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Fourth stage of bone growth |
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Final stage of bone growth |
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Zones of growth |
Resting (distal) Growth cartilage -hypertrophy Calcification Ossification |
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2 hormones that control calcium levels |
Parathyroid hormone Calcitonin (thyroid) |
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Parathyroid hormone |
Released when blood calcium levels are low |
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Calcitonin |
Released when blood calcium levels are high |
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Epiphyseal artery and vein |
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Metaphyseal artery and vein |
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Periosteum |
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Compact bone |
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Medullary cavity |
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Branches of nutrient artery and vein |
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Periosteum |
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Periosteal arteries and veins |
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Periosteal arteries and veins |
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Connections to superficial osteons |
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Nutrient artery and vein |
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Nutrient foramen |
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Metaphysis |
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Epiphyseal line |
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Metaphyseal artery and vein |
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Cirfumfrential lamellae |
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Osteons |
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Percolating fibers |
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Vein |
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Artery |
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Arteriole |
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Central canal |
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Percolating canal |
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Trabecular of spongy bone |
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Concentric lamellae |
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Interstitial lamellae |
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Periosteum |
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Capillary |
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Venule |
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Bone healing steps |
1) hematoma 2) callus-soft 3) callus-hard, woven 4) remodeling- mature bone |
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Osteoporosis |
Bone loss disease where bone respiration exceeds bone deposition. Common in post-menopausal women because estrogen inhibits osteoclasts |
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Paranasal sinuses |
Hollow portions of bones surrounding the nasal cavity |
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Maxillary sinus |
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Sphenoidal sinus |
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Ethmoid sinus |
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Frontal sinus |
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Fontanelle |
The infant skull. Areas between bone are fibrous connective tissue |
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Vertebral column |
Spine. Protects spinal cord. |
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Sacrum |
5 fused in spine |
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Coccyx |
3-5 fused |
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Curvature of vertebral column |
Cervical Thoracic Lumbar Sacral |
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Abnormal curves |
Hyperlordosis, hyperkyphosis (anterior posterior) Scoliosis (lateral) |
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Joints |
Articulation where two or more bones meet |
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Joint functions |
Holds bones together and allow for mobility |
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Synarthroses |
Immovable joints |
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Amphiarthroses |
Slightly movable joints |
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Diarthroses |
Freely movable joints |
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Fibrous joints |
Generally immovable |
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Cartilaginous joints |
Immovable or slightly movable |
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Synovial joints |
Freely movable |
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Distinguishing features of synovial joints |
Articular cartilage Articular capsule Joint cavity Reinforcing ligaments |
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Accessory structures of synovial joints |
Tendons Ligaments Capsule Bursa |
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Tendon |
Attach to muscles around joint |
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Ligament |
Attach bone to bone |
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Capsule |
Surrounds the joint and is lined by synovial membrane |
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Bursa |
Flattened sacs of synovial membrane |
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Weight bearing part of spine |
Joints anterior to spinal cord |
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Movement part of spine |
Joints posterior to spinal cord |
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Parts of discs between vertebrae |
Inner gel like nucleus pulposis and outer annular fibers |
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Gout |
Uric acid crystals |
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Arthritis |
All forms of rheumatism that damage articular cartilage of synovial joints |
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Osteoarthritis |
Caused by wear and tear of joint surfaces or genetic factors affecting collagen formation |
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Coronal structure |
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Lambdoid sature |
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Squamous suture |
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Ethmoid bone |
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Sphenoid bone |
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Sphenoid bone |
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Ethmoid bone |
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Mandible |
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Maxilla |
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Vomer |
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Inferior nasal concha |
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Middle nasal conch of ethmoid bone |
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Zygomatic bone |
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Lacrimal bone |
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Mental foramen |
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Perpendicular plate |
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Middle nasal concha of ethmoid bone |
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Inferior orbital |
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Optic canal |
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Superior orbital fissure |
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External acoustic meatus |
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Mastoid process |
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Styloid process |
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Foramen rotundum |
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Internal acoustic meatus |
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Foramen magnum |
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Jugular foramen |
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Foramen spinosum |
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Foramen ovale |
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Sella turcica |
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Optic canal |
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Crista galli |
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Cribriform plate |
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Jugular foramen |
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Occipital condyle |
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Ptertgoid processes |
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Palatine bone |
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Cribniform plate |
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Perpendicular plate |
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Middle nasal concha |
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Crista galli |
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Lesser wing |
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Orbital surface of greater wing |
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Pterygoid canal |
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Pterygoid process |
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Medial plate |
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Lateral plate |
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Foramen rotundum |
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Greater wing |
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Superior orbital fissure |
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Sphenoid |
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Sphenoid sinus |
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Sphenoid spine |
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Sella turcica |
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Optic groove |
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Posterior clinoid process |
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Dorsum sellae |
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Mandibular notch |
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Mandibular condyle |
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Ramus of mandible |
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Mandibular angle |
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Body of mandible |
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Alveolar margin |
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Mandibular foramen |
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Mandibular does a of temporal bone |
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Coronoid process |
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Mandibular fossa of temporal bone |
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Muscle tissue function |
Contraction |
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Skeletal muscle functions |
Produce skeletal movement, maintain body position Support soft tissues Guard openings Maintain body temperature Store nutrient reserves |
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Blood vessel |
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Perimysium |
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Epimysium |
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Bone |
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Endomysium |
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Tendon |
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Fascicle |
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Muscle fiber |
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Sarcoplasm |
Cytoplasm |
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Sarcolemma |
Plasma membrane |
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Transverse tubule |
Invagination of sarcolemma |
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Sarcoplasmic reticulum |
Specialized ER that stores and releases calcium, surrounding myofibrils |
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Terminal cisterna |
Enlarged sacs of SR near transverse tubules |
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Mitochondria |
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Sarcolemma |
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Myofibril |
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Thin filament |
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Thick filament |
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Triad |
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Sarcoplasmic reticulum |
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T tubules |
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Myofibrils |
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Sarcoplasm |
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Sarcolemma |
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Terminal cisterna |
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Contraction proteins |
Actin and myosin |
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Regulatory |
Troponin and tropomyosin |
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Muscle contraction |
Calcium release initiates this and results in conformational change |
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Bone matrix makeup |
65% inorganic 35% organic |
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Haversian system |
Compact vs spongy bone classification |
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Joint classification |
Function and structure |
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Sprain |
Ligament or capsule injury |
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Strain |
Muscle or tendon injury |