Question

The circulatory system includes which of the following? a. the heart only c. the heart and the brain b. the heart and blood vessels d. none of the above

Answer 1

Bonjour!

The answer should be ~

The heart and the blood vessels.

The brain is not part of the Circulatory system, and the heart is not the only part of it either.

The Circulatory system is made up of seperate systems that work together:

The Heart, the lungs, portal vessels, and the Arteries.

These systems are responsible for blood flow, carrying nutrients, as well as hormones (from cell to cell), and gasses (oxygen), as well.

Therefore, your answer is ~

The heart and the blood vessels

Hope I was of assistance!

~DL ☆ ☆ ☆

Answer 2

The answer should be C, the heart and the blood vessels.

The heart acts as a pump in the circulatory system. It pumps blood to organs and tissues all around the body. Meanwhile, the blood vessels (arteries, veins, and capillaries) help transport the blood to tissue and cells and back to the heart. Each type of blood vessel has their own function.

The brain is not involved in this system, as the whole circulation process does not require any us to make any decision.

In addition, there's also one structure that is in the blood vessels, but technically not another item for the circulatory system. That's valves, they are like flaps that ensure blood flowing in one wag direction and to prevent the back flow of blood.

So, the answer is C.