The Composition of Blood Flashcards

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Note: We may include questions that have multiple correct answers. It’s useful to remember specific examples to understand these concepts better.

What are the four components of blood?

Red blood cells, white blood cells, platelets and plasma.

What is the main function of red blood cells?

To carry oxygen from the lungs to the body’s tissues for aerobic respiration.

What molecule in red blood cells binds to oxygen?

Haemoglobin binds to oxygen to form oxyhaemoglobin.

What are the two main types of white blood cells and their functions?

Phagocytes (engulf and digest pathogens) and Lymphocytes (produce antibodies to destroy pathogens).

How do platelets help when we get a cut?

Platelets rush to the wound to form a clot, preventing blood loss and blocking microorganisms from entering.

Name two adaptations of red blood cells that make them efficient at transporting oxygen.

They have no nucleus to provide more space for haemoglobin and are shaped like biconcave disks for a large surface area to volume ratio.

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