The correct answer is Circulatory System. The respiratory system works closely with the circulatory system to oxygenate the body's cells by exchanging oxygen and carbon dioxide in the lungs and transporting oxygen-rich blood to the tissues throughout the body.
A human's respiratory system works the most closely with this system to oxygenated the body's cells.
Question 2 options:
Circulatory System
Nervous System
Digestive System
Lymphatic system
1 answer
1 answer