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reduce friction at movable joint surfaces
few cells large quantity of extracellular matrix
water most abundant substance of this material
extracellular matrix in cartilage
when the cartilage is compressed, the water moves. this movement of water within the cartilage helps this tissue in joint lubrication.
Are living entities of bone tissue. they have the capacity to both build bone tissue and break it down
Extra Cellular Matrix
Collagen-gives bones tensile strength
Bone salts or minerals
Hydorxyapatite- hard stuff of bone
Affords bone its compressive strength
relationship between inorganic and organic (extra cellular matrix)
too much collagen rubbery like
too much Hydroxyapatite, bone becomes too brittle
Spongy or Trabecualr bone
main structural feature of spongy bone is the trabecular.
always in interior of a bone beneath compact bone
delicate meshwork of interconnected plates or beams of bone
you can see the small spaces between the bone looks like a hardened sponge.
the spaces contain bone marrow, YELLOW and RED depending on locaton or age along with numerous blood vessels
spongy area helps lend strength to bone
external bone covering-
dense irregular tissue
contains osteoclast, osteoblast & blood vessels
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