Which organ system does the triceps muscle in the back of the upper arm primarily belong to?

• A. Nervous system
• B. Muscular system
• C. Digestive system
• D. Respiratory system

Answer: (B)

Verified step by step guidance

1. Step 1: Begin by identifying the triceps muscle as a specific anatomical structure located in the back of the upper arm. It is responsible for extending the forearm at the elbow joint.
2. Step 2: Recall that muscles are specialized tissues that contract to produce movement, maintain posture, and generate heat. These functions are characteristic of the muscular system.
3. Step 3: Evaluate the options provided in the question. The nervous system controls muscle activity but does not include muscles as part of its structure. The digestive and respiratory systems are unrelated to the triceps muscle's function or location.
4. Step 4: Understand that the triceps muscle is composed of skeletal muscle tissue, which is a key component of the muscular system. Skeletal muscles are under voluntary control and are attached to bones to facilitate movement.
5. Step 5: Conclude that the triceps muscle primarily belongs to the muscular system, as it is directly involved in movement and is classified as a skeletal muscle.