Blood and Circulation
- Created by: Katie_04
- Created on: 28-04-19 14:31
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- Blood and Circulation
- Blood
- Made of plasma, red blood cells, white blood cells, platelets
- plasma
- transports ; chemical substances, products of digestion, hormones, anti-bodies, urea, carbon dioxide
- red blood cells
- transports oxygen from lungs to tissue and cells and for respiration. Contains hemoglobin -> binds to oxygen. No nucleus, small, bio-concave disks
- white blood cells
- fight against infection, change shape, engluf microorganisms
- plasma
- trigger blood clotting
- Blood Vessels
- carry blood around the body
- Arteries
- thick walls
- veins
- take blood from organs to heart
- thin walls to prevent backflow
- take blood from organs to heart
- capillaries
- allow substances to pass out/ in the blood
- Gaseous exchange
- heat sends blood to lungs by pulmonary artery
- air reaches lungs through trachea
- trachea divides into two tubes (bronchi)
- bronchi --> bronchioles, bronchioles--> alveoli, blood is taken back to heart through pulmonary vein
- Untitled
- trachea divides into two tubes (bronchi)
- air reaches lungs through trachea
- heat sends blood to lungs by pulmonary artery
- The heart
- double circulatory system
- blood passes through heart twice on each circuit
- blood enters the heart through the atria
- atria contract and force blood into the ventricles
- ventricles contract and force blood out of the heart
- valves make sure blood flows in correct direction
- ventricles contract and force blood out of the heart
- atria contract and force blood into the ventricles
- double circulatory system
- Blood
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