cardiovasular system
- Created by: Chantelle..
- Created on: 09-01-19 18:39
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- cardiovascular system
- arteries and arterioles
- transport blood away from the heart
- walls have 3 layers
- outer- fibrous tissue middle-muscle tissue inner- endothelium
- large arteries have more muscle
- lets them stretch
- arterioles
- muscle layer is very thin
- allows pressure to be maintained
- muscle layer is very thin
- veins and venules
- return blood to the heart
- at low pressure
- walls are thinner than arteries
- has the same 3 layers as arteries
- veins have valves to prevent backflow
- return blood to the heart
- capillaries
- the smallest arterioles and venules meet at capillaries
- walls are one cell thick
- water and small molecules can pass
- allows body tissue to receive nutrients
- takes away waste products
- functions of blood
- transportation
- transport oxygen, nutrients and waste products
- protection
- fights infection
- temperature regulation
- distributing and depositing heat
- transportation
- atrial systole
- contraction of atria
- ventricular systole
- contraction of ventricles
- complete cardiac diastole
- relaxation of atria and ventricles
- arteries and arterioles
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