Order the route of blood through the heart from the body.
Reveal answer
- vena cava
- right atrium
- right ventricle
- pulmonary artery
- pulmonary vein
- left atrium
- left ventricle
- aorta
Key words: atrium · ventricle
3(h) TRANSPORT · RECALL
3.15 Structure and function of the heart
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Why is the left ventricle wall thickest?
Reveal answer
Pumps to whole body → needs highest pressure → more muscle.
Key words: pressure
What do heart valves prevent?
Reveal answer
Backflow of blood.
Key words: backflow
Which vessels supply the heart muscle?
Reveal answer
Coronary arteries.
Key words: coronary
What separates the two sides of the heart?
Reveal answer
The septum.
Key words: septum
What is meant by the term atrium?
Reveal answer
Upper chamber receiving blood into the heart.
Key words: atrium
What is meant by the term ventricle?
Reveal answer
Lower chamber pumping blood out.
Key words: ventricle
What is meant by the term septum?
Reveal answer
Wall separating right and left sides.
Key words: septum
What is meant by the term coronary artery?
Reveal answer
Vessel supplying heart muscle.
Key words: coronary artery
Heart regions: for Right atrium, give the blood received/sent and the structural feature.
Reveal answer
Blood received/sent: Receives vena-cava blood. Structural feature: Thin wall.
Key words: Right atrium
Heart regions: for Right ventricle, give the blood received/sent and the structural feature.
Reveal answer
Blood received/sent: Sends blood to pulmonary artery. Structural feature: Moderately thick wall.
Key words: Right ventricle
Heart regions: for Left atrium, give the blood received/sent and the structural feature.
Reveal answer
Blood received/sent: Receives pulmonary-vein blood. Structural feature: Thin wall.
Key words: Left atrium
Heart regions: for Left ventricle, give the blood received/sent and the structural feature.
Reveal answer
Blood received/sent: Sends blood to aorta. Structural feature: Thickest wall.
Key words: Left ventricle
Heart regions: for Septum, give the blood received/sent and the structural feature.
Reveal answer
Blood received/sent: Separates sides. Structural feature: Prevents mixing.
Key words: Septum
Heart regions: for Valves, give the blood received/sent and the structural feature.
Reveal answer
Blood received/sent: Between chambers/at exits. Structural feature: Prevent backflow.
Key words: Valves
True or false, and why? “The pulmonary artery carries oxygenated blood.”
Reveal answer
False. It carries deoxygenated blood from right ventricle to lungs.
True or false, and why? “Valves pump blood.”
Reveal answer
False. Pressure opens/closes valves; cardiac muscle generates pressure.
True or false, and why? “The left wall is thicker because it holds more blood.”
Reveal answer
False. It must generate greater systemic pressure.