Human Circulatory System Concepts

This video tutorial covers the human circulatory system, explaining its components and functions. It details the heart's anatomy, the types of blood vessels, and the processes of systemic and pulmonary circulation. The tutorial highlights the closed and double circulation nature of the human circulatory system, emphasizing the role of the heart, arteries, veins, and capillaries in transporting oxygen and nutrients throughout the body.

What is the primary function of the human circulatory system?

• To store energy

• To produce hormones

• To transport nutrients and oxygen

• To digest food

How many times does blood pass through the heart in one complete circulation?

• Four times

• Three times

• Twice

• Once

Where is the human heart located?

• In the abdomen

• In the right chest cavity

• In the neck

• In the left chest cavity

What prevents blood from flowing back into the atria from the ventricles?

• Muscles

• Bones

• Valves

• Nerves

Which type of blood vessel carries blood away from the heart?

• Capillaries

• Arteries

• Veins

• Lymphatics

What is the largest artery in the human body?

• Carotid artery

• Pulmonary artery

• Femoral artery

• Aorta

What is the main function of capillaries?

• To pump blood

• To filter blood

• To store blood

• To exchange gases and nutrients

In systemic circulation, where does oxygen-rich blood go after leaving the left ventricle?

• To the stomach

• To the entire body

• To the brain

• To the lungs

What happens to blood in the lungs during pulmonary circulation?

• It gains carbon dioxide

• It loses oxygen

• It gains oxygen

• It loses nutrients

Which vessel carries oxygen-rich blood from the lungs to the heart?

• Vena cava

• Aorta

• Pulmonary vein

• Pulmonary artery