The Heart

What is the circulatory system?

• It is a group of organs which perfom nutrition.

• It is a group of organs which perform circulation.

• It is a group of organs which perform respiration.

• It is a group of organs which perfom revolution.

What is circulation?

• It is the process by which blood is moved around the body.

• It is the process by which carbon dioxide is moved around the body.

• It is the process by which waste is moved around the body.

• It is the process by which oxygen is moved around the body.

What are the main organs of the circulatory system?

• The heart and the the lungs.

• The heart and the blood vessels (arteries, trachea and capillaries).

• The heart and the blood vessels (arteries, veins and capillaries).

• The heart and the blood vessels (arteries, veins and bronchi).

What is the function of blood?

• The function of blood is to carry oxygen, waste and other nutrients to all the cells in the human body.

• The function of blood is to carry oxygen, water and other nutrients to all the cells in the human body.

• The function of blood is to carry carbon dioxide, waste and other nutrients to all the cells in the human body.

• The function of blood is to carry only oxygen to all the cells in the human body.

What is the heart?

• It is the most important organ of the circulatory system. It is a muscular organ and it is the pump of the body.

• It is the most important organ of the excretory system.

• It is the most important organ of the nervous system. It is in the head.

• It is the most important organ of the respiratory system. It is in the chest.

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What is the function of the heart?

• Its function is to pump blood around the body through the trachea.

• Its function is to carry oxygen around the body.

• Its function is to pump blood around the body through the blood vessels.

• Its function is to carry waste around the body.

Can the heart stop pumping?

• Yes, it stops while we are sleeping.

• No, because it has batteries.

• No, because our body is in constant need of oxygen.

• No, because our body is in constant need of glucose.

The heart has 4 chambers:

• 2 right ventricles and 2 left ventricles

• 1 right ventricle, 1 left ventricle, 1 right atrium and 1 left atrium

• 1 right lung, 1 left lung, 1 right atrium and 1 left atrium

• 1 right atrium and 1 right ventricle.

What is the first step when blood enters the heart?

• Oxygenated blood enters the heart through the right atrium. Then it passes to the right ventricle, where it is pumped into the lungs.

• Deoxygenated blood enters the heart through the right atrium. Then it passes to the right ventricle, where it is pumped into the lungs.

• Deoxygenated blood is pumped into the left atrium. Then it passes to the left ventricle, from where it is pumped around the body through the arteries.

• Oxygenated blood is pumped into the left atrium. Then it passes to the left ventricle, from where it is pumped around the body through the arteries.

What happens when the blood is pumped into the lungs?

• In the lungs, the blood passes through the alveoli and picks up carbon dioxide and gets rid of oxygen.

• Deoxygenated blood is pumped into the left atrium. Then it passes to the left ventricle, from where it is pumped around the body through the arteries.

• Oxigenated blood is pumped into the left atrium. Then it passes to the left ventricle, from where it is pumped around the body through the arteries.

• In the lungs, the blood passes through the alveoli and picks up oxygen and gets rid of carbon dioxide.