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42 Cards in this Set

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Osteology

The storehouse of Calcium.


Bone tissue is a highly dynamic tissue that undergoes constant change, not only during our growing years, but continuously throughout our lifetime.

Study of bones. And cartilage

Bone tissues

Biological material combining strength with the expectational ability to remodel and repaired

Cartilage-supporting tissue

Building blocks and classification

Cartilage

"Soft Bone" it is firm but pliable, ideally suited for its primary roles, which are: reduce friction.


soft tissue


principal shock absorber affectionally called "flexible skeleton" few cells, extracellular matrix


* does not have nerves or blood *

Cells ~ chondrocytes

Cartilage cells

Extracellular matrix

Is a complex maze of proteoglycans & proteins


~lot of H20


Function: Joint lubrication by means by means of weeping .

Proteoglyncans

Ground substance


are proteins that are heavily glycosylated. The basic proteoglycan unit consists of a "core protein" with one or more covalently attached glycosaminoglyca

Collagen

Fibers


Gives us strength.

Elastic

Fibers


Stretch & recoil

Hyaline cartilage

Is classification of collagen fiber


Few fibers


Very smooth and hard like glass


Most common cartilage in the body articular surface connecting


-external ear


-anterior ends of the rib


-passages ways of upper respiratory -tract


-growth plates

Eyes & ears

Fibrocartilage

Many thick collagen fibers


Rubber, built for absorption ,firm


The large number thick collagen fibers that are densely distributed in the rubbery matrix.


strong Intevertebral discs


menisci b/w the knee joint


shock absorption between bones example vertebrae column, knees & ribs

Knees spine & ribs

Elastic fibers

Elastic cartilage give us elastic it stretches.


Is the least common type of cartilage in the body.


Thick mesh fibers


"guardian of airway" wont let choke ex. Epiglotis throat


example outter ear, nose

Outer

Classification

Similarities to other connective/supporting tissues.


- few cells and lots of extracellular matrix


highly vascular (bloodvessels /arteries ) packed



Differences from other connective/ supporting tissues


- very hard

Strenght to Resist tension- physical properties of bone tissue

Tension equals force that pull the material apart


contains collagen.

Strength to resist compression- physical properties of bone tissue

Compression equals force that push the material together


contains bone salt (Hydroxyapetite) always changing growing (cells)

Ability to remodel or change

Dynamic tissue that can change in response to environmental strain.

Osteoblast

Builds bones everywhere "child cells"


New cell

New cell

Osteocyte

Found in mature bone


maintain bone


adult cell

Bone cell " adult cell"

Osteoclast

Degrade bone / destroys it " cleave "

Bone + klastos = broken breaking

Organic components

Resist tension


collagen gives bone its tensile strength .

Inorganic components

Bone salts or minerals .

Hydroxyapatite

The hard stuff of bone.


-resist compression


affords bone its compressive strength.

Bone

Function of bones

1) support + muscle attachment


2) protections organs


3) enclosed blood forming elements 4) metabolic role

Weight of bone

22% water


78% organic components and inorganic components


Ability to resist tension + compression

Compact bone

Surface of bone


appears as dense, solid bone to the unaided eye


Microscopically porous

Surface

Osteon

Fundamental structural compact bone

= bone.

Relation between cells blood vessels and hard matrix .

1) blood supplies with nutrients


2) cells passes along what not needed to outer cells


3) when nutrients stop, the ring stops

Central canal

Small network of blood vessels & nerves. (Comes out)

The lil veins

Trabecula

Expands surface area internal bone space between sponge like network of bone containing bone marrow

Lil beam

Bone marrow

Is a tissue compromised of many cells in imbedded in reticular tissue.


-blood cells precursors, macrophages adipose cells & reticular cells

LONG - classification of bones

Greatest length in one dimension

Femur lg... phalanges smll

SHORT - classification of bone

Cube - like bones

Like the spine

FLAT- classification of bone

Platelike bones top of head

Top of head

IRREGULAR - classification of bone

Complex shapes that do not fit in any of the above categories

Compact bone distribution.

Outside + shaft of long bone

Lengthy outer

Spongy bone distribution

Inside + ends of longbone

Ends inside spongy

Periosteum

Is a thin layer of dense irregular collagenous connective tissue

Articular cartilage

The articular surface of the bone have a thin covering oh hyaline cartilage and called the articular cartilage

Cartilage

Diaphysis

"2 ends" the long mid section or long bone line

Shaft

Epiphysis

End of part of a ling bone

Ends of bone

Medullary cavity

Hollow center of bone "marrow is store"= marrow cavity


yellow bone marrow

Marrow

Nutrient foramen

Supply the bone with blood vessels=


- opening in the bone cavity


-carries blood vessels into bone tissues

Lil vein