Circulatory System By the end of this lesson, I will be able to: Understand the functions of the circulatory system. Label the heart.

The circulatory system has 3 main functions: Transport Carries blood, water, oxygen and nutrients throughout the body. Removal of waste products Body temperature control Blood absorbs body heat and carries it to the lungs and to the skin where it is released. Protection Helps to fight disease. Antibodies which fight infection are carried in the blood.

Circulatory System Consists of 4 main parts: 1.The heart 2.The blood 3.The blood vessels 4.The pulmonary and systemic circuits

Heart Is divided into two parts (double pump) The two upper chambers are called atria. The two lower chambers are called ventricles. The walls of the heart are made up of cardiac muscle.

How does it work? The heart pumps blood by contracting. It does this in two stages. The right side pumps blood from the body to the lungs and returns it to the heart. This is called Pulmonary circulation. The left side pumps oxygenated blood from the lungs to the body and then it returns to the heart. This is called systemic circulation. The large tubes that carry blood away from the heart are called arteries. The aorta is the largest artery. The large tubes that carry blood back to the heart are called veins.

Lungs Body

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