Functional Anatomy Flashcards
what is wolff’s law
Bone responds to the forces or lack of forces placed on it
how many bones in the body
206
what is the function of skeletal system (PSA)
- Protection of vital organs
- Support an upright posture
- Attachment points for muscles which apply force to the bones for movement
define long bones
levers for body movement
define short bones
cube-shaped to provide strength and provide little movement (wrist and ankle ones
define flat bones
larger flat area for numerous muscle attachments; provides protection (skull, ribs)
define irregular bones
peculiar/various shaped and functions (vertebrae, facial bones)
define sesamoid bones
embedded within tendon or other fascia (pisiform, patella,)
what is diaphysis
long portion of the bone, made of compact bone
what is epiphysis
expanded portion at the ends, made of spongy bonee
what is epiphyseal (growth) plate
cartilage disk present until 18-20 years of age, it will fuse the epiphysis to diaphysis
what is the periosteum
tough, outer fibrous covering of outer bone
what is medullary cavity (marrow)
location in center of the bone for marrow
what is endosteum
membrane lining the medullary cavity
what are osteoclasts
they break down older bone and resorb itw
what are osteoblasts
lays down new bone
what is remodelling
process of building up and breaking down bone
what makes up the skull?
occipital, frontal, parietal, temporal, maxilla, mandible