9.1 Blood

Under a .........................., you can see that blood isn’t completely red.

• telescope

• microscope

• boroscope

A watery liquid full of tiny cells.

• White blood cell

• Plasma

• Red blood cell:

The largest cell - stained purple its function is to help to destroy the micro-organisms that cause infectious diseases.

• White blood cell

• Plasma

• Red blood cell:

Gather around the damaged area to stop blood from leaking out if you cut a blood vessel.

• Platelets

• Plasma

• Red blood cell:

Red blood cells are....................

• biconcave

• biconvex

• convex

Red blood cells can squeeze through capillaries – your narrowest blood vessels.

Which property is this?

• Flexibility.

• Large surface area.

Help red blood cells pick up oxygen quickly as they pass through your lungs.

Which property is this?

• Flexibility.

• Large surface area.

Plasma transports digested food from ..........................................................

• the small intestine to all cells

• respiring cells to lungs

• liver to kidneys

Plasma transports carbon dioxide from ..........................................................

• the small intestine to all cells

• respiring cells to lungs

• liver to kidneys

Plasma transports urea from ..........................................................

• the small intestine to all cells

• respiring cells to lungs

• liver to kidneys