The heart muscle is a part of which organ system? You may select multiple answers. A. Digestive

B. Circulatory

C. Skeletal

D. Muscular

B. Circulatory

Explanation:

B. Blood carries oxygen and other important nutrients that all body organs need to stay healthy and to work properly. Your heart is a muscle, and its job is to pump blood throughout your circulatory system.The cardiovascular system includes the heart (cardio) and blood vessels (vascular). The cardiovascular system is responsible for pumping and circulating the blood. The musculoskeletal system includes the bones, muscles, ligaments, tendons, and joints, which support and move the body.

Explanation:

i think its control and coordinate because im pretty sure thats what tissue does and the joints are what control movement and then your skeletal/ bones provides portection. hope that .

d) center of the mid-ocean ridge

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