What is the hardest type of connective tissue?
Osteocytes
What are the three types of osteocytes and what do they do?
1) osteoblasts- building.
2) osteoclasts- crushing.
3) osteocytes- mature.
What is the bulk of bone formed by?
Osteons
In the micro structure of the bone, what does the central canal contain?
Blood vessels, nerves and lymph vessels
In the microstructure of the bone, what does the lamellae look like?
Growth rings on a tree
What is compact bone and what is some of its qualities?
It is layers of matrix.
- hard, dense and rigid
- filled with minute holes and passageways
- supply with nutrients and oxygen
- blood vessels are located within holes
What is cancellous bone and what are some of its qualities?
- aka spongy bone
- porous, thin and bony elements
- contain bone marrow
What type of bone has the nickname “spongy bone” ?
Cancellous bone
Function of the skeleton?
1) Support: framework, gives shape and rigidly to the body.
2) Protection: protect soft delicate organs. (Skull protects brain)
3) movement: (locomotion) forms leavers to which muscles are attached.
4) manufacturing blood cells: red blood cells are manufactured in red bone marrow.
5) homeostasis: helps to maintain a constant level of calcium in the blood.
6) storage:!materials stored for later use. (Example calcium, fat & energy)
In the long bone, where a outs is the yellow bone marrow located?
The diaphysis (bone shaft)
On the long bone, what does the articulate cartilage do?
Protects end of bone and has a smooth surface