Grade 6 Science & Technology · Strand 1: Living things and the Environment · Human Circulatory System
Double Circulation
A short Grade 6 Science & Technology lesson for the CBE curriculum, part of Living things and the Environment: Human Circulatory System. Learn it on any phone with notes and slides, then check yourself with a quick quiz and earn XP. This lesson is free.
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5 questions from this lesson’s quiz. Start the lesson to answer them and see the right answers.
1. Which statement correctly describes the pulmonary circuit?
- A. It carries oxygenated blood from the left ventricle to all body organs.
- B. It carries deoxygenated blood from the right ventricle to the lungs and returns oxygenated blood to the left atrium.
- C. It pumps blood at high pressure through the aorta to the brain.
- D. It mixes oxygenated and deoxygenated blood in the middle of the heart.
2. Why is the muscular wall called the septum important in the human heart?
- A. It stops oxygenated blood from mixing with deoxygenated blood.
- B. It pumps blood into the aorta.
- C. It carries blood to the lungs.
- D. It makes blood look blue.
3. Which of these shows the correct order of a red blood cell's journey, starting in the right atrium?
- A. Right atrium → right ventricle → pulmonary artery → lungs → pulmonary vein → left atrium → left ventricle → aorta
- B. Right atrium → left ventricle → aorta → lungs → pulmonary vein → left atrium → right ventricle
- C. Right atrium → pulmonary vein → lungs → pulmonary artery → left atrium → left ventricle → aorta
- D. Right atrium → aorta → body → left atrium → lungs → right ventricle
4. Why does the left ventricle have the thickest muscular wall in the heart?
- A. It must pump blood only a short distance to the lungs.
- B. It must pump blood at high pressure to the whole body.
- C. It stores oxygen for the lungs.
- D. It receives blood directly from the body through the vena cava.
5. Name the main artery that carries oxygenated blood from the left ventricle to the body.
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