Question

Which of the following statements is correct? (1 point)

O The circulatory system is made of the heart and a network of red blood cells.
O The circulatory system is made of the lungs and a network of blood vessels.
O The circulatory system is made of the lungs and a network of red blood cells.
O The circulatory system is made of the heart and a network of blood vessels.

Answer 1

The last one the circulatory system is made up of the heart and blood vessels