Bipedalism Flashcards
Do Bones have cells?
Duhhh
Bone cells also respond to trauma. Whats does this mean
They unite parts together once broken (Even if not braced in usual angle)
The two extracellular components of Bones
Organic & Inorganic
How much % of Bone is Oragnic
33%
Function of Oragnic bone
To resist tention so doesnt snap from minor incovenieces
How much % of Bone is Inorganic
67%
(Made up of mineral salts which are hard and resistant to compression)
With it they bend and are like other tissue
The Cellular componet of bone makes up How much % of bone weight
Just 2%
The four types of Cells in bone
➢ Osteogenic cells
➢ Osteoblasts
➢ Osteocytes (Mature bone cells)
➢ Osteoclasts
Osteogenic cells are..
Osteogenic cells are stem cells found in bone tissue.
They differentiate into osteoblasts
Osteoblasts are..
Makers- Produce new bones (Builders)
Osteocytes are..
Maintainers - Recycle protein and minerals from matrix
Osteoclasts are
Destroyers
remove bone matrix to remodel, repair, release calcium, and maintain strength.
Are Cancellous and Compact bones made of same stuff?
Yes (the arrangement is different)
Osteon structure can be found in which bone type
Compact
Central canal in osteons contains..
Blood vessels and nerves
Lamellae in osteons are
A series of Cylimders formed of ECM around the central canal
(Wood rings analogy)
Lacunae in Osteons are..
‘lakes’ for osteocytes
Canaliculi in osteons are..
Channels for nutrients
to travel to osteocytes through the ECM
Interstitial lamellae are…
Still being broken down old Osteons
Circumferential lamellae are..
Bone layers that encircle the outer and inner surfaces.
What are trabeculae, and what fills the spaces between them
Trabeculae are thin, porous bone structures that provide strength and support in cancellous bones.
Marrow fills the cavities between trabeculae.
Osteocytes are housed in lacunae between lamellae or on the surface.
Organisation of trabeculae resists
force from multiple directions (True or False)
True
Free correct
Heck yeah. You need it cause ur not doing well
