Bone, muscle. Lecture 1

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Bones and muscles 1

5 functions:

support

blood cell production

transport of minerals and lipids

leverage

protection

2 skeletons:

Axial - skull sternum

appendicular - shoulder

long bones

short bones

flat bones

sutaral bones- skull

irregular bones

sesamoid bones

^^^ Look up definitions of

Bone histology

4 main parts

Hard matrix

bone cells

canaliculi

perostium-membrane covering outer surface

epitheseal growth. top of the bone grows out

length

and change in diameter.

Bone cells

Osteocytes: in mature bone. repair and regenerates calcium

Osteoblasts: Production of bone

Osteoclasts:Resorption of bone during growth

compact bone:

harvesin system

Lamelle;rings around central canal

lacunae: spaces between bone containing osteocytes

canalicuni: network of canals between lacunae allowing transport of nutrients and waste

Spongey bones:

trabeculae: odd plates

Lucanae Lies here

osteons in diaphysis

osteons in part of bone where not stressed

bone markings:

elevations where ligaments and tendons attatch to bone

more stress on bone makes stronger. body weight maintains

and less than body weight bones brittle

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