IGCSE /Grade 10
Science MCQ Based On Structure and functions of arteries veins and capillaries
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IGCSE Grade 10 Science Structure and functions of arteries veins and capillaries
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muscular walled tubes forming part of the circulation system
They have 3 layers
Capillary walls consist of a single layer of flattened endothelial cells, the endothelia,
The aorta is the largest blood vessel in your body.
they return deoxygenated blood from the body into the heart
they control flow of fluid
Capillaries transport blood, nutrients and oxygen to cells in your organs and body systems.
distributes oxygen and nutrients throughout the body
blood in the veins have less pressure than arteries
1st layer surrounds the blood, 2nd layer contains elastic fibre and 3rd layer contains nerves
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