blood components

Question 1

what is plasma?
what is its functions?

Answer 1

liquid part of blood
transports co2 to lungs
transports urea to kidneys to excreted in urine

Question 2

what are red blood cells?
how are they specialised for their functions?

Answer 2

transports oxygen from lungs to body cells
contain oxygen carrying molecule haemoglobin
no nucleus for more room for haemoglobin
shape is biconcave disc which increases surface area which increases rate of diffusion of oxygen

Question 3

what are white blood cells?

Answer 3

part of immune system
contain nucleus