Grade 6 Science & Technology · Strand 1: Living things and the Environment · Human Circulatory System
White Blood Cells and Platelets
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 structural feature is found in white blood cells but is absent in mature red blood cells?
- A. Haemoglobin
- B. A prominent nucleus
- C. A biconcave disc shape
- D. A bright red colour
2. Which statement best describes platelets?
- A. Large cells that engulf bacteria
- B. Red cells that carry oxygen
- C. Tiny cell fragments made in the bone marrow that help blood to clot
- D. The pale yellow liquid part of blood
3. Nurse Achieng explains that some white blood cells make antibodies. What do antibodies do?
- A. They carry oxygen to the tissues
- B. They form the hard scab on a wound
- C. They carry digested food around the body
- D. They stick to pathogens, neutralising them and tagging them for destruction
4. In healthy blood there is roughly 1 white blood cell for every 600 red blood cells. If a blood sample under a microscope shows 4 white blood cells, about how many red blood cells would you expect to find?
Type your answer (in red blood cells) in the lesson.
5. What is the name of the tough protein mesh that forms during blood clotting and traps blood cells like a tiny fishing net?
Type your answer in the lesson.
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