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Blood

SCIENCE 2ND YEAR

QuestionAnswer
What are the functions of the blood? Transport and defence against disease.
What are the 3 types of blood vessels? Arteries, capillaries, veins.
What does the artery have and what does it do? It has a small lumina and a thick muscular wall. It has no valves. It carries blood away from the heart under pressure.
What does the vein have and what does it do? It has a large lumen and a thin wall. They have valves to prevent the back flow of blood. They take blood to the heart.
What does the capillaries have and what do they do? They are blood vessels which are only one cell thick. They connect arteries to veins.
What is the vena cava? It takes blood to the heart.
Where does the blood go after going through the vena cava? It goes into the right atrium.
Where does it go after the right atrium? It goes through a valve then to the right ventricle, then through another valve and out the pulmonary artery to the lungs.
Explain the left system to the heart. It goes in the pulmonary vein from the lungs and goes into the left atrium, then through the left ventricle and up and out of the aorta to the cells of the body.
Created by: rachelfurey