Grade 6 Science & Technology · Strand 1: Living things and the Environment · Human Circulatory System
Blood Vessels Veins
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 feature of veins stops blood from flowing backwards when it is under low pressure?
- A. Thick elastic muscular walls
- B. One-way valves with flexible flaps
- C. A very narrow lumen
- D. High pressure from the heart
2. Which of the following correctly describes a vein compared with an artery?
- A. Thicker wall and narrower lumen
- B. Thinner wall and wider lumen
- C. Thicker wall and valves absent
- D. Thinner wall and no lumen
3. Wanjiru is walking to school. How do the muscles in her legs help blood in her leg veins to return to her heart?
- A. They squeeze the veins and push blood forward through the valves
- B. They make the veins walls thicker so blood moves faster
- C. They open the valves so blood can flow backwards
- D. They pump blood into the arteries instead
4. Which part of the vena cava brings blood from the abdomen, legs and feet to the heart?
- A. Superior vena cava
- B. Inferior vena cava
- C. Pulmonary artery
- D. Aorta
5. What is the name for the hollow space inside a blood vessel through which blood flows?
Type your answer in the lesson.
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