Circulatory System- Blood

Question 1

What is bloods job?

Answer 1

acts as a huge transport system

Question 2

What is the job of red blood cells?

Answer 2

carries oxygen from the lungs to all the cells around the body

Question 3

What is the shape of the red blood cell and why is this helpful?

Answer 3

biconcave disc

gives large surface area for absorbing oxygen

Question 4

Why do red blood cells not have a nucleus?

Answer 4

it gives a larger surface are no a to carry oxygen

Question 5

What is the red pigment in red blood cells called?

Answer 5

haemoglobin

Question 6

What does haemoglobin do in the lungs and in body tissues?

Answer 6

lungs- binds together with oxygen to become oxyhaemoglobin

tissues- oxyhaemoglobin splits up into haemoglobin and oxygen to release into cells

Question 7

What is phagocytosis?

Answer 7

when white blood cells change shape to gobble up unwanted microorganisms

Question 8

What is the function of antibodies and antitoxins?

Answer 8

antibodies- produced to fight microorganisms

antitoxins- produced to neutralise toxins produced by the microorganism

Question 9

What are platelets?

Answer 9

small fragments of cells with no nucleus that help your blood clot at your wound to stop blood from flowing out and microorganisms getting in

lack of platelets cause excessive bleeding and bruising

Question 10

What substances do plasma carry?

Answer 10

liquid that carries everything in the blood:

red blood cells 
white blood cells
platelets 
urea
amino acids 
glucose
carbon dioxide 
protein
hormones
antitoxins 
antibodies