Irene's Physiology C Musculoskeletal

23 terms by curtham

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review for phys test

Diaphysis

Shaft of the long bone

Epiphysis

Ends of the bone; spongy bone; contain red bone marrow

Endosteum

Fascial membrane that lines the medullary cavity

Medullary Cavity

Cavity of the diaphysis; contains yellow (fat) bone marrow

Osteogenesis

Means : in the embryo

Chondroblasts

Builds cartilage (in the embryo) for the cartilage model/structure of the bones

Osteoblasts

Makes bone from the early 'bones' made of cartilage; after birth calcification of the bones occurs

Osteocytes

Mature bone cells

Osteoclasts

Breaks down old and damaged bone cells

Bone Classifications

Compact - having little space between the tissues
Spongy - Having larger spaces in between the tissues; Red bone marrow in the ends of long bones

Trabeculae

The lacey-like structure in spongy bone

Lamellae

The name given to one ring of bone cells (around a blood vessel)

Osteon

The name given to a full set bone cell rings (around blood vessels)

Haversian Canal

The longitudinal canals in long bones that blood vessles pass through

Volkmann's Canal

The transverse canals that blood vessels pass through

Bone 'recipe'

25% water
25% protein fiber
50% Mineral salts

Cranium Bones (8 )

Frontal, parietals, temporals, ethmoid, sphenoid, occipital

Facial Bones (14)

Mandible, maxillas, zygomatics, lacrimals, volmar, palatines, nasal conchas

Ossicles (6)

(ear bones) hammers, anvils, stapes

Cranial Sutures

Coronal, sagittal, squamosal, lamdoidal

Muscle Characteristics

Excitability, Contractibility, Extensibility, Elasticity

Myofibril

The structural unit of the muscle containing Actin(thin) & Myosin (thick); several in one muscle cell

Acetylcholine (ACh)

The principle neurotransmitter involved with muscle contraction

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