TRANSPORT Flashcards
RED BLOOD CELLS
transports oxygen from the lungs to respiring cells for aerobic respiration
WHITE BLOOD CELLS
phagocytes engulf and digest pathogens and lymphocytes produce antibodies to deactivate antigens of bacteria
PLASMA
medium of transport which carries carbon dioxide, digested food, urea, hormones and heat
ADAPTATIONS OF RED BLOOD CELLS
- haemoglobin
- no nucleus ( more haemoglobin)
- small and flexible
- thin cell membrane
- biocave ( flattened disc shape )
ADAPTATIONS OF PHAGOCYTES
- sensitive cell surface membrane
- digestive enzymes in cytoplasm
- irregular shaped nucleus
ADAPTIONS OF LYMPHOCYTES
- large nucleus
deoxygenated blood from respiring cells will be carried by the…
vena cava to the right atrium
the right atrium will contract which will increase pressure and…
push blood through the valve and into the right ventricle
right ventricle will contract and will increase the pressure, causing blood to…
flow out of the pulmonary artery to be oxygenated at the lungs
pulmonary vein will carry oxygenated blood…
from the lungs to the left atrium
the left atrium will contract which will increase pressure and…
push blood through the valve and into the left ventricle
left ventricle will contract and will increase the pressure, causing oxygenated blood…
to be carried out by the aorta to respiring cells under high pressure
CAUSES OF CORONARY HEART DISEASE
- poor diet
- stress
- smoking
ARTERIES
- carries oxygenated blood away from the heart ( excluding pulmonary artery )
- has thick muscular walls ( to withstand high pressure )
- has small lumen ( passageways )
- blood is under high pressure to pump blood to the whole body
VEINS
- carries deoxygenated blood to the heart ( excluding the pulmonary vein )
- has thin walls
- has valves to prevent the backflow of blood as it is under low pressure
- has large lumen ( passageways )
- blood is under low pressure
