Which three of the following make up the cardiovascular system?

The cardiovascular system, also known as the circulatory system, is made up of three main components:

1. The Heart: This is the main organ of the cardiovascular system. It is responsible for pumping blood throughout the body. The heart is a muscular organ that contracts to pump blood out and then relaxes to let blood back in after it has circulated through the body.

2. Blood Vessels: These are the network of tubes through which the blood flows. They include arteries, which carry blood away from the heart, veins, which return blood to the heart, and capillaries, which enable the exchange of water and chemicals between the blood and tissues.

3. Blood: This is the fluid that circulates throughout the body via the cardiovascular system. It carries oxygen and nutrients to the cells and waste products away from the cells. Blood is made up of red blood cells, white blood cells, platelets, and plasma.

The cardiovascular system is made up of three main components:

1. The Heart: This is the pump of the system. It is responsible for pumping blood throughout the body. It does this by contracting and relaxing in a rhythmic manner.

2. Blood Vessels: These are the channels through which the blood flows. They include arteries, which carry blood away from the heart, veins, which carry blood back to the heart, and capillaries, which enable the exchange of oxygen, nutrients, and waste materials between the blood and the body's cells.

3. Blood: This is the fluid that circulates throughout the body via the blood vessels. It carries oxygen and nutrients to the body's cells, and removes waste materials. It also plays a key role in the body's immune system.