Circulatory System Concepts

This video tutorial explores the circulatory system, focusing on the heart's structure and function. It explains the double circulatory system, detailing the pulmonary and systemic circuits. The video also covers the heart's chambers, valves, and the role of blood vessels in circulation. Finally, it discusses coronary arteries and their importance in heart health.

What is the primary function of the circulatory system?

• To digest food

• To transport substances around the body

• To produce hormones

• To store energy

Why is the circulatory system in mammals called a double circulatory system?

• It has two hearts

• It has two separate circuits

• It has two layers of skin

• It has two types of blood

Which circuit carries blood from the heart to the lungs and back?

• Pulmonary circuit

• Systemic circuit

• Coronary circuit

• Digestive circuit

What are the upper chambers of the heart called?

• Atria

• Valves

• Ventricles

• Arteries

What is the function of the atrioventricular valves?

• To store blood

• To pump blood

• To ensure blood flows in one direction

• To oxygenate blood

Why does the left ventricle have a thicker wall than the right ventricle?

• It pumps blood to the lungs

• It pumps blood to the entire body

• It stores more blood

• It is closer to the heart

Which blood vessel carries deoxygenated blood from the body to the heart?

• Coronary artery

• Vena cava

• Pulmonary vein

• Aorta

What is the largest artery in the body?

• Coronary artery

• Aorta

• Vena cava

• Pulmonary artery

What is the role of coronary arteries?

• To transport nutrients to the brain

• To remove waste from the body

• To supply the heart muscle with oxygenated blood

• To carry blood to the lungs

What could happen if the coronary arteries become blocked?

• Liver disease

• Heart attack

• Lung infection

• Kidney failure