Heart Flashcards
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
What do lymphocytes produce?
Antibodies against microorganisms
Why do you have a high white blood cells count?
When have an infection
Multiply to fight it off
Function of platelets?
Help blood clotting
What can lack of platelets cause?
Excessive bleeding
Bruising
What is liquid in blood called?
Plasma
What is carried in plasma?
Blood cells Platelets Nutrients Carbon dioxide Hormones Antibodies
Word equation for aerobic respiration
Glucose + oxygen = water + carbon dioxide + energy
Complete word equation for anaerobic respiration
Glucose = lactic acid
What is area between 2 sides of heart?
Septum