Question

which organ system includes the heart as its main pumping organ? (1 point)
respiratory system
digestive system
nervous system
circulatory system

Explanation:

The circulatory system is responsible for transporting blood throughout the body, and the heart is its main pumping - organ that propels the blood. The respiratory system deals with gas exchange, the digestive system with food processing, and the nervous system with transmitting signals.

Answer:

D. Circulatory System