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23 terms

Irene's Physiology C Musculoskeletal

review for phys test
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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