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206 Cards in this Set

  • Front
  • Back

Skeletal system components

Bones


Cartilage, ligaments, and connective tissues

Skeleton functions

Support, protection, movement, storage, hematopoiesis

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

Flat bone

Plate like


Has 2 thin layers of compact bone surrounded by a layer of spongy bone

Short bone

Width and length about the same

Sesamoid

A type of short bone within a tendon (patella)

Irregular bone

No real category (vertebrae)

Diaphysis bone

Shaft, primarily compact

Epiphysis

Ends of long bone, covered with articular cartilage

Metaphysis

Neck

Epiphyseal plate

Growth plate, the site of growth in length of a long bone

Osteoblasts

Produce new bone, make matrix

Osteocytes

Mature bone cells in lacuna, maintain matrix

Osteoclasts

Reabsorb or breakdown bone. Make protons and enzymes

Osteoprogenitor

Stem cell whose divisions produce osteoblasts

Tensile strength

Made by collagen fibers

Compressive strength

Given by hydroxyapetite (Ca10(PO4)6(OH)2)

Removing collagen

Makes brittle bones

Removing minerals

Makes overly flexible bone

Compact bone

Dense, more matrix, less space

Lamella

Collagen arranged in a pattern.

Osteon

Structural unit of compact bone

Spongy bone

Cancellous, less matrix, more space

Bone struts

Trabeculae

Diploe

Flat bones

Woven bone

Random arrangement of collagen fibers. In fetal development

Lamellar

Mature bone. Collagen fibers are parallel to each other and at angles to other lamella

Inrramembranous bone growth

Bone development occurs by replacing membrane with bone

Endocbondral bone growth

Replacing the line cartilage with bone

Outer connective tissue sheath

Periosteum

Inner cavity sheath

Endosteum

Chondroblast

Cell that produces matrix

Chondrocyte

Mature cell in space "Laguna", makes matrix

First stage of bone growth

Hyaline cartilage model

Second stage of bone growth

Third stage of bone growth

Fourth stage of bone growth

Final stage of bone growth

Zones of growth

Resting (distal)


Growth cartilage


-hypertrophy


Calcification


Ossification

2 hormones that control calcium levels

Parathyroid hormone


Calcitonin (thyroid)

Parathyroid hormone

Released when blood calcium levels are low

Calcitonin

Released when blood calcium levels are high

Epiphyseal artery and vein

Metaphyseal artery and vein

Periosteum

Compact bone

Medullary cavity

Branches of nutrient artery and vein

Periosteum

Periosteal arteries and veins

Periosteal arteries and veins

Connections to superficial osteons

Nutrient artery and vein

Nutrient foramen

Metaphysis

Epiphyseal line

Metaphyseal artery and vein

Cirfumfrential lamellae

Osteons

Percolating fibers

Vein

Artery

Arteriole

Central canal

Percolating canal

Trabecular of spongy bone

Concentric lamellae

Interstitial lamellae

Periosteum

Capillary

Venule

Bone healing steps

1) hematoma


2) callus-soft


3) callus-hard, woven


4) remodeling- mature bone

Osteoporosis

Bone loss disease where bone respiration exceeds bone deposition. Common in post-menopausal women because estrogen inhibits osteoclasts

Paranasal sinuses

Hollow portions of bones surrounding the nasal cavity

Maxillary sinus

Sphenoidal sinus

Ethmoid sinus

Frontal sinus

Fontanelle

The infant skull. Areas between bone are fibrous connective tissue

Vertebral column

Spine. Protects spinal cord.

Sacrum

5 fused in spine

Coccyx

3-5 fused

Curvature of vertebral column

Cervical


Thoracic


Lumbar


Sacral

Abnormal curves

Hyperlordosis, hyperkyphosis (anterior posterior)


Scoliosis (lateral)

Joints

Articulation where two or more bones meet

Joint functions

Holds bones together and allow for mobility

Synarthroses

Immovable joints

Amphiarthroses

Slightly movable joints

Diarthroses

Freely movable joints

Fibrous joints

Generally immovable

Cartilaginous joints

Immovable or slightly movable

Synovial joints

Freely movable

Distinguishing features of synovial joints

Articular cartilage


Articular capsule


Joint cavity


Reinforcing ligaments

Accessory structures of synovial joints

Tendons


Ligaments


Capsule


Bursa

Tendon

Attach to muscles around joint

Ligament

Attach bone to bone

Capsule

Surrounds the joint and is lined by synovial membrane

Bursa

Flattened sacs of synovial membrane

Weight bearing part of spine

Joints anterior to spinal cord

Movement part of spine

Joints posterior to spinal cord

Parts of discs between vertebrae

Inner gel like nucleus pulposis and outer annular fibers

Gout

Uric acid crystals

Arthritis

All forms of rheumatism that damage articular cartilage of synovial joints

Osteoarthritis

Caused by wear and tear of joint surfaces or genetic factors affecting collagen formation

Coronal structure

Lambdoid sature

Squamous suture

Ethmoid bone

Sphenoid bone

Sphenoid bone

Ethmoid bone

Mandible

Maxilla

Vomer

Inferior nasal concha

Middle nasal conch of ethmoid bone

Zygomatic bone

Lacrimal bone

Mental foramen

Perpendicular plate

Middle nasal concha of ethmoid bone

Inferior orbital

Optic canal

Superior orbital fissure

External acoustic meatus

Mastoid process

Styloid process

Foramen rotundum

Internal acoustic meatus

Foramen magnum

Jugular foramen

Foramen spinosum

Foramen ovale

Sella turcica

Optic canal

Crista galli

Cribriform plate

Jugular foramen

Occipital condyle

Ptertgoid processes

Palatine bone

Cribniform plate

Perpendicular plate

Middle nasal concha

Crista galli

Lesser wing

Orbital surface of greater wing

Pterygoid canal

Pterygoid process

Medial plate

Lateral plate

Foramen rotundum

Greater wing

Superior orbital fissure

Sphenoid

Sphenoid sinus

Sphenoid spine

Sella turcica

Optic groove

Posterior clinoid process

Dorsum sellae

Mandibular notch

Mandibular condyle

Ramus of mandible

Mandibular angle

Body of mandible

Alveolar margin

Mandibular foramen

Mandibular does a of temporal bone

Coronoid process

Mandibular fossa of temporal bone

Muscle tissue function

Contraction

Skeletal muscle functions

Produce skeletal movement, maintain body position


Support soft tissues


Guard openings


Maintain body temperature


Store nutrient reserves

Blood vessel

Perimysium

Epimysium

Bone

Endomysium

Tendon

Fascicle

Muscle fiber

Sarcoplasm

Cytoplasm

Sarcolemma

Plasma membrane

Transverse tubule

Invagination of sarcolemma

Sarcoplasmic reticulum

Specialized ER that stores and releases calcium, surrounding myofibrils

Terminal cisterna

Enlarged sacs of SR near transverse tubules

Mitochondria

Sarcolemma

Myofibril

Thin filament

Thick filament

Triad

Sarcoplasmic reticulum

T tubules

Myofibrils

Sarcoplasm

Sarcolemma

Terminal cisterna

Contraction proteins

Actin and myosin

Regulatory

Troponin and tropomyosin

Muscle contraction

Calcium release initiates this and results in conformational change

Bone matrix makeup

65% inorganic


35% organic

Haversian system

Compact vs spongy bone classification

Joint classification

Function and structure

Sprain

Ligament or capsule injury

Strain

Muscle or tendon injury