the blood Flashcards
what are the 4 components of blood?
red blood cells
white blood cells
plasma
platelets
what is blood?
a transport medium
what does the blood do?
move substances around the body
what are the 2 structures of red blood cells?
biconcave.
no nucleus.
what is the function of red blood cells? why?
carry oxygen to reach body cells for aerobic respiration
why are red blood cells biconcave?
large surface area to carry more oxygen
what protein is contained in the red blood cell? what does it do?
haemoglobin.
helps blood absorb oxygen.
how is oxyhaemoglobin formed?
at the lungs:
haemoglobin + oxygen
how is haemoglobin formed? what is released?
oxyhaemoglobin breaks down at the cells.
releasing oxygen.
what are the 2 structures of white blood cells?
bigger than red blood cells.
have a nucleus.
are there more white or red blood cells?
red blood cells
what are the 2 functions of white blood cells?
kill unwanted microorganisms like bacteria.
produce antibodies.
what are the 2 structures of plasma?
straw coloured liquid.
liquid.
why is plasma a liquid?
helps blood flow
what are the 2 functions of plasma?
carry the blood components.
transport nutrients, waste products, hormones proteins etc.
