Musculoskeletal SystemATI TEAS 7 cheat sheet

Bones, joints and muscle

9 key facts 5 practice questions Reviewed Oct 2026

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Skeleton

206 bones in the adult
Axial — skull, spine, ribs; appendicular — limbs and girdles
Functions: support, protection, movement, blood cell production, calcium storage

Muscle Types

Skeletal — striated, voluntary, moves bones
Cardiac — striated, involuntary, heart only
Smooth — non-striated, involuntary, organs and vessels

Movement

Muscles pull, never push — they work in opposing pairs
Tendons join muscle to bone; ligaments join bone to bone

Contraction

Needs calcium and ATP; actin and myosin slide past each other

Key takeaway

Bones, joints and muscle

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Question 1 of 5

Which organ system provides structure and protects internal organs?

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