Question

4. Which organ system in humans is most directly involved in the

transport of oxygen?
excretory
nervous
circulatory
O digestive

Answer 1

C. Circulatory System

Step-by-step explanation:

The circulatory system (cardiovascular system or the vascular system) is an organ system that permits blood to circulate and transport nutrients (such as amino acids and electrolytes), oxygen, carbon dioxide, hormones, and blood cells to and from the cells in the body to provide nourishment and help in fighting diseases, stabilize temperature and pH, and maintain homeostasis.

Answer 2

The heart and lungs