Plasma and Platelets in Blood Flashcards

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What is blood plasma?

Plasma is the pale yellow liquid part of blood that carries blood cells and dissolved substances.

What is the main substance that makes up blood plasma?

Plasma is mostly water, which makes it a good liquid for carrying many dissolved substances.

Name three types of substance that plasma transports around the body.

Plasma transports digested food, carbon dioxide, hormones, and waste like urea.

How does plasma help remove carbon dioxide from body cells?

Plasma carries dissolved carbon dioxide from body cells to the lungs, where it is breathed out.

How does plasma help get rid of urea from the body?

Plasma carries urea from the liver to the kidneys, where it is removed in urine.

How does plasma help to control body temperature?

Plasma carries heat from one part of the body to another, helping to keep the whole body at a steady temperature.

What are platelets?

Platelets are small fragments of cells in the blood that help it to clot.

Where are platelets made in the body?

Platelets are made in the bone marrow, inside some bones.

What is the main job of platelets?

The main job of platelets is to help form blood clots to seal wounds.

What happens when you cut your skin and platelets start clotting?

Platelets stick to the cut, release chemicals, and help form a mesh of fibres. This dries into a scab that seals the wound.

Why is blood clotting important for health?

Clotting stops too much blood loss and helps stop bacteria and viruses entering the body through cuts.