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Healthy 1 (the heart (muscular pump, pumps blood around the lungs and…
Healthy 1
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hormones
One of the functions of blood is to transport dissolved substances, including hormones, around the body.
blood is a tissue made up of:plasma, red blood cells, white blood cells and platelets
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Blood vessels
arteries carry blood away from the heart they have a thicker muscle wall have small passageways for blood and they also contain blood under high pressure
veins carry blood to the heart they have thin walls they have a larger internal lumen contain blood under low pressure they also have valves to prevent blood from fowling backwards
capillaries are found in the muscles and lungs and are microscopic have a very low blood pressure and its where gas exchange takes place