Chapter 4 - Slides

The Musculoskeletal System

What is the epiphyseal plate?

growth plate

What does the epiphyseal plate do?

Allows the bone to continue to grow length wise

Most bones start out as-

cartilage

What causes the middle of the bones to hallow out?

blood vessels

epiphyses

ends of bones

diaphysis

middle of bone; shaft

metaphysis

neck; connects the diaphysis with the epiphysis

axial

center

appendicular

arms and legs

skeleton

framework for your body

axial skeleton

skull, spine, sternum, ribs

appendicular skeleton - upper extremities

arms, wrists, hands

appendicular skeleton - lower extremities

legs, ankles, feet

joints

where two bones meet

what do joints do?

most joints allow movement between the bones

joint movements

flexion, extensions, adduction, abduction

flexion

tightening of the joints

extension

stretching of the joints

adduction

narrowing of a joint

abduction

widening of a joint

joints are held by -

ligaments and tendons

joints can have supportive structures

cartilage and bursae

muscles function are

to move the bones

muscles are

are bundles of muscle fibers and covered by fascia

what are the types of muscles?

skeletal/striated, cardiac, smooth