The Circulatory System

Mr. Anderson explains the circulatory system, highlighting its importance in transporting oxygen, carbon dioxide, and nutrients. He discusses different circulatory systems in organisms, heart chambers, and circulation loops. The video covers blood flow, heart function, blood composition, and the cardiac cycle. It concludes with the heart's electrical system and the importance of maintaining heart health.

What is the primary function of the circulatory system?

• To store energy

• To digest food

• To transport oxygen and nutrients

• To produce hormones

What type of circulatory system do insects have?

• Single-loop system

• Closed circulatory system

• Open circulatory system

• Double-loop system

Why do fish have a two-chambered heart?

• They live on land

• They are warm-blooded

• They live in water

• They have a high metabolism

What is a characteristic of a three-chambered heart?

• It has separate oxygenated and deoxygenated blood

• It is found in mammals

• It has a single loop

• It allows mixing of oxygenated and deoxygenated blood

In the human heart, where does deoxygenated blood enter first?

• Right ventricle

• Left atrium

• Right atrium

• Left ventricle

What is the role of the pulmonary artery?

• To carry blood from the lungs to the heart

• To carry nutrients to the heart

• To carry oxygenated blood to the body

• To carry deoxygenated blood to the lungs

What is the main difference between arteries and veins?

• Veins have valves

• Arteries have valves

• Veins have thicker walls

• Arteries carry blood to the heart

What component of blood is responsible for fighting infections?

• White blood cells

• Platelets

• Plasma

• Red blood cells

What does the cardiac cycle consist of?

• Only systole

• Neither systole nor diastole

• Only diastole

• Systole and diastole

What is the function of platelets in the blood?

• Clot blood

• Fight infections

• Transport oxygen

• Carry nutrients