Ch. 10 Musculoskeletal System Flashcards
The musculoskeletal system includes:
muscles, bones, joints, and related structures (tendons and connective tissue that function in the support and movement of body parts and organs)
articulation
Place of union between two or more bones; also called joint
hematopoiesis
Production and development of blood cells, normally in the bone marrow
ligaments
Connective tissue that surrounds the joint capsule to bind bones to other bones
tendons
Connective tissue that binds muscle to bone on either side of a joint
Muscle tissue is composed of:
contractile cells, or fibers, that provide movement of an organ or body part.
Muscles contribute to:
posture, produce body heat, and act as a protective covering for internal organs.
three types of muscle tissue in the body:
- Skeletal
- Smooth
- Cardiac
Skeletal muscles
attached to bones
provide means for movement
voluntary muscles
aka striated muscles
voluntary muscles
contract and relax in response to conscious thought
Smooth muscles
assist internal process (digestion, circulation, urination)
called visceral muscles
aka involuntary muscles
involuntary muscles
movement is not under conscious control but functions under the control of the autonomic (involuntary) nervous system
Cardiac muscle
in heart wall
forms the myocardium
striated like skeletal muscle
produces rhythmic involuntary contractions like smooth muscle.
Adduction
Moves closer to the midline
Abduction
Moves away from the midline
Flexion
Decreases the angle of a joint
Extension
Increases the angle of a joint
Rotation
Moves a bone around its own axis
Pronation
Turns the palm downward
Supination
Turns the palm upward
Inversion
Moves the sole of the foot inward
Eversion
Moves the sole of the foot outward
Dorsiflexion
Elevates the foot
Plantar flexion
Lowers the foot (points the toes)