Circulatory System

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like urea.

It also contains useful things like;

Slide 21

SUMMARY

copy and complete the following;

Arteries take blood from the heart. The walls of an artery are made up of thick _ walls and elastic fibres. Veins carry blood the heart and also have valves. The _ link arteries and veins, and have a one cell thick wall. Blood is made up of four main things , the liquid part of the blood; Red Blood Cells to carry ; White Blood cells to protect the body from disease and _ to help blood clot.

away

platelets

towards

capillaries

plasma

oxygen

muscular