Heart
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Name 4 chambers of heart
Left and right atrium Left and right ventricle
What kind of blood does right atrium receive?
Deoxygenated blood
Where does right ventricle pump blood to?
Lungs Via pulmonary artery
What type of blood does left atrium receive?
Oxygenated blood
What vein does blood from lungs go through?
Pulmonary vein
Which ventricle has a thicker wall and why?
Left because it has to pump blood around the whole body at high pressure
What do valves do?
Prevent backflow of blood in heart
What is formula for cardiac output?
Heart rate bpm x stroke volume cm3
Function of arteries?
Carry blood away from heart
Function of capillaries?
Exchange of materials at tissues
Function of veins?
Carry blood to heart
Name of hole in blood vessels?
Lumen
Describe artery walls
Strong Elastic Thick
Describe capillary walls
Semi permeable Allows diffusion of substances
What waste products do capillaries transport?
Carbon dioxide
Explain advantage of capillary walls being one cell thick
Increases rate of diffusion
Another name for red blood cells?
Erythrocytes
What are 4 main things in blood?
Red blood cells White blood cells Platelets Plasma
Job of red blood cells?
To carry oxygen from lungs to all cells
Why are red blood cells shaped like a donut?
To increase surface area
Do RBC have a nucleus?
No Allows more room to carry oxygen
What makes RBC red?
Haemoglobin
Do white blood cells have a nucleus?
Yes
Name 2 types of white blood cells?
Phagocytes Lymphocytes