B7 circulation
- Created by: superlouasaur
- Created on: 30-03-15 09:12
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- B7- circulation
- Moving molecules
- Active muscles need a good supply of glucose and oxygen
- Arteries carry blood to your organs
- In fine capillaries, useful molecules are passed from the blood to the cells
- Double circulatory system gets blood to both the lungs and the body
- This requires a double pump
- High pressure needed for the whole body
- Lower pressure needed for the lungs
- Blood
- Plasma
- The pale yellow fluid the cells float in
- Transports materials such as : glucose, antibodies, hormones and waste (urea and CO2)
- Helps to distribute heat
- Red blood cells
- Packed with the protein haemoglobin
- binds oxygen as it passes through the blood
- Biconcave shape allows more surface area making diffusion of gases more efficient
- Flexible to fit through capillaries
- Packed with the protein haemoglobin
- White blood cells
- Protect the body from infection
- Phagocytosis (engulf and digest/ produce antibodies)
- Platelets
- Fragments of the cell from the cytoplasm
- Cause clotting (when cut)- stop toomuch blood loss
- Plasma
- Double circulation
- Each side has 2 chambers, atrium and ventricles
- Blood from the body enters the right atrium of the heart
- Pumped thought the right ventricle to the lungs to become oxygenated
- Returns to the left atrium and passes to the left ventricle
- Gets a harder pump to push it around the body ( thicker ventricle muscle)
- Blood becomes deoxygenated then returns to the right atrium
- Blood from the body enters the right atrium of the heart
- Pumped thought the right ventricle to the lungs to become oxygenated
- Returns to the left atrium and passes to the left ventricle
- Gets a harder pump to push it around the body ( thicker ventricle muscle)
- Blood becomes deoxygenated then returns to the right atrium
- Blood becomes deoxygenated then returns to the right atrium
- Gets a harder pump to push it around the body ( thicker ventricle muscle)
- Returns to the left atrium and passes to the left ventricle
- Pumped thought the right ventricle to the lungs to become oxygenated
- Blood from the body enters the right atrium of the heart
- Blood becomes deoxygenated then returns to the right atrium
- Gets a harder pump to push it around the body ( thicker ventricle muscle)
- Returns to the left atrium and passes to the left ventricle
- Pumped thought the right ventricle to the lungs to become oxygenated
- Valves
- Heart valves
- Between each atrium and ventricle
- Between the ventricles and the arteries
- Veins
- Lower blood pressure than arteries
- Stop it flowing backwards
- Heart valves
- capillary bed/ network
- The double pump gives the blood enough energy to reach the capillaries
- One cell thick so exchange is easier
- Tissue fluid
- When blood plasma is squeezed out of a capillary
- Bathes all our cells
- Oxygen and glucose diffuse from it to the cells
- Waste products like CO2 and urea diffuse into the fluid
- Moving molecules
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