Sistema circulatorio

What is the main function of the heart in the circulatory system?

• Pumping blood throughout the body

• Production of hormones

• Regulation of body temperature

• Absorption of nutrients in the intestine

Describe the structure of the heart and mention the four main cavities.

• The heart has two atria and two ventricles as its four main cavities.

• The heart has one ventricle and three atria as its four main cavities.

• The heart has four atria and no ventricles as its four main cavities.

• The heart has three atria and one ventricle as its four main cavities.

What type of blood vessels carry blood from the heart to the rest of the body?

• veins

• capillaries

• nerves

• arteries

Explain the difference between arteries and veins in the circulatory system.

• Veins have valves and arteries do not.

• Arteries are thinner than veins.

• Arteries carry deoxygenated blood and veins carry oxygenated blood.

• Arteries carry oxygenated blood and veins carry deoxygenated blood.

What are capillaries and what is their function in blood circulation?

• Capillaries are organs that filter blood before it reaches the heart

• Capillaries are small-diameter blood vessels that allow the exchange of nutrients and waste between the blood and tissues.

• Capillaries are muscles that help pump blood through the body

• Capillaries are blood vessels that carry oxygen to the lungs

Mention two common diseases related to the arteries in the circulatory system.

• Atherosclerosis and arteriosclerosis

• Arteritis

• Thrombosis

What is blood pressure and why is it important for cardiovascular health?

• Blood pressure is the speed at which the heart beats and does not influence cardiovascular health

• Blood pressure is the body's temperature and does not affect cardiovascular health

• Blood pressure is the force that blood exerts against the walls of the arteries. It is important for cardiovascular health because high blood pressure can damage blood vessels and increase the risk of heart disease and strokes.

• Blood pressure is the amount of blood in the body and is not related to cardiovascular health

Describe the blood circulation process in the human body.

• The blood flows from the lungs to the heart through the arteries

• The blood is pumped by the heart through arteries that carry oxygenated blood throughout the body. Then, the blood returns to the heart through veins to be pumped to the lungs and receive oxygen again.

• The blood moves through the body by means of breathing

• The heart pumps blood through the veins

What role do valves play in the circulatory system?

• The valves in the circulatory system prevent blood backflow and ensure that blood flows in one direction.

• The valves in the circulatory system control blood pressure

• The valves in the circulatory system are responsible for the production of red blood cells

• The valves in the circulatory system help regulate body temperature

What is the function of red blood cells in the blood?

• Regulate blood pressure

• Transport oxygen and carbon dioxide

• Remove toxins from the body

• Produce insulin