muscuskeletal system/challenges Flashcards
what are bones
Structure covered by membrane called periosteum
have bone marrow and blood vessels inside
functions of bones
frame for body
give shape
allow movement
protect internal structures
produce blood cells
store calcium and phosphorus
5 types of bones
long bones
short bones
flat bones
irregular bones
sesamoid bones
long bones definition
hard and dense bones that provide strength, structure, and mobility (humerus, radius, femur)
short bones definition
allow skill and ease in movements (wrist and ankle bones)
flat bones definition
thin, flat and curved bones that protect organs (sternum, skull, ribs)
irregular bones definition
oddly shaped with various bony projections that interact with other bones, provide sites for muscle attachment (spinal vertebrae)
sesamoid bones definition
usually short or irregular bones embedded in a tendon and protect it (patella/kneecap)
features of joints
where two or more bones meet
cartilage cushions the joint
synovial membrane secrets fluid to lubricate the joint
ligaments hold together joint
list 6 types of synovial joints
ball and socket
hinge
pivot
condyloid
saddle
gliding
3 types of muscle cells
striated/skeletal or voluntary
smooth or involuntary
cardiac or involuntary
functions of muscles
allow movement
maintain posture
produce heat (shivering)
3 major types of joints
fibrous or immoveable
cartilaginous or slightly moveable
synovial or freely moveable
ligaments definition
strong bands of connective tissue connecting bones
tendons definition
strong, tough connective tissue connecting bone to muscle