1) Muscles contract and relax to move bones at joints. The biceps and triceps muscles work antagonistically to bend and straighten the elbow joint. 2) When bending the elbow, the biceps contracts which pulls the bones and bends the joint, while the triceps relaxes. When straightening the elbow, the triceps contracts to pull the bones straight, and the biceps relaxes....
Read more ↓1) Muscles contract and relax to move bones at joints. The biceps and triceps muscles work antagonistically to bend and straighten the elbow joint. 2) When bending the elbow, the biceps contracts which pulls the bones and bends the joint, while the triceps relaxes. When straightening the elbow, the triceps contracts to pull the bones straight, and the biceps relaxes. 3) Antagonistic muscles work in pairs, with one muscle contracting to move the bones in one direction, and the other muscle contracting to move the bones in the opposite direction.
Read less ↑Tags: 1. Antagonistic muscles, 2. Biceps and triceps, 3. Muscle contraction, 4. Joint movement, 5. Ball-and-socket joints, 6. Elbow joint, 7. Musculoskeletal system, 8. Movement of bones
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