Bones

Question 0

Cartilage - supporting tissue

Cells of the cartilage is called …

Answer 0

Chondricytes

Question 1

Bone tissue is a

Answer 1

highly dynamic tissue that undergoes constant change, not only through our growing years but continuously throughout our lifetime.

Question 2

Extracellular matrix is ..

Ground substance ..

Fibers

Answer 2

•A ground substance of large proteoglycan

GROUND SUBSTANCE :
• proteoglycan - trap and hold water

FIBERS :
• collagen - great tensile strength
• elastic - stretches and recoils

Question 3

Name the 2 Classification of fibers

Answer 3

Collagen fibers
•Few fibers = hyaline cartlige
•Many fibers = fibrocartilage

Elastic fibers
• elastic cartlige

Question 4

Name the 3 types of cartilage

Answer 4

1) hyaline cartilage - few cologne fibers
• hyaline cartilage is the most common cartilage in the body
• end of long bones
• smooth and glassy

2) Fibrocartilage - many fibers
• shock absorption between bones

3) elastic cartilage - elastic

Question 5

Name 4 connective tissue

Answer 5

General connective tissue
( loose connective tissue )

Cartilage

Bone

Blood

Question 6

Bone tissue or supporting tissue
• classification
Similarities and differences

Answer 6

Similarities :
• few cells - lots of extra cellular matrix
• highly vascular
• contains collagen

Differences :
• hard

Question 7

physical properties of bone tissue

Answer 7

• hydroxyapatite has the strength to resist compression
• collagen has the strength to resist tension
• has the ability to remodel or change because of its cells.

Question 8

Name the 3 Building blocks of bone tissue

Answer 8

•Cells give the bone ability to remodel or change

1) osteoblasts - build bone
2) osteocyte - maintain bone, connect with other osteocytes, principal cell for completely formed bones
3) osteoclast - consumes bone or breaks down bone

Question 9

Name 2 extracellular matrix

Answer 9

1) organic- collagen , gives bone tensile strength

2) inorganic - Hydroxyapatite, Resist compression

Question 10

Ability to :
Collagen -
Hydroxyapatite -
Cells -

Answer 10

• Collagen - resist tension
• Hydroxyapatite - Resist compression
• Cells – remodel or change

Question 11

2 types of bone tissue –

Answer 11

1) Compact bone :
• Always a surface
• osteon : the osteon Is the fundamental structural unit of the compact bone
• Compact bone is microscopically porous
• Very vascular
• Holes from a blood vessel are visible without a microscope

2) Spongy or trabecular bone :
• always the interior of the bone
• contains red bone marrow
• always deep to the compact bone

Question 12

Name the four classifications of bones and their structures

Answer 12

1) Long – greatest length in one dimension
2) Short – cube like bones
3) Flat - plate like bones
4) Irregular – complex shapes that do not fit in any of the above categories

Question 13

Anatomy of a typical long bone

Answer 13

Compact -
• Surface bone - thicker along the shaft – thinner at the ends

Spongy -
• Deep to the compact bone – at the ends of long bone – contains red bone marrow

Periosteum -
• Dense irregular collagenous connective tissue

Articular Cartilage -
• Made out of hyaline cartilage – glassy and smooth

Diaphysis - shaft Of long bone VS.
epiphysis - Ends of long bone

Medullary cavity -
• Yellow bone marrow – found only in long bones

Nutrient foremen -
• The blood vessel travels into the bone tissue

Question 14

6 Functions of bone tissue and bones

Answer 14

• Support – Skeletal framework
• movement – Joints that are movable
• protection – Brain, rib cage
• calcium Homeostasis–
• blood cell information – Red bm
• energy storage - Yellow bm