Blood

Question 1

What is blood made up of?

Answer 1

Plasma
Red blood cells
White blood cells
Platelets

Question 2

What does plasma do?

Answer 2

a liquid that carries the components in the blood

Question 3

What does red blood cells do?

Answer 3

• they carry oxygen molecules from the lungs to all cells in the body
• bioconcave shape provides large surface area
• no nucleus allowing for more room to carry oxygen
• contains haemoglobin

Question 4

What do red blood cells do?

Answer 4

• they carry oxygen molecules from the lungs to all cells in the body
• bioconcave shape provides large surface area
• no nucleus allowing for more room to carry oxygen
• contain haemoglobin

Question 5

What do white blood cells do?

Answer 5

• part of the immune system (the body’s defence system against pathogens)
• have a nucleus
• A range of types: those that produce antibodies, those that digest pathogens & those that produce antitoxins to enutralise toxins

Question 6

What do platelets do?

Answer 6

• help blood clot at the site of wound
• the clot dries and hardens to form a scab, which allows new skin to grow underneath while preventing microorganisms from entering
• small fragements of cells
• no nucleus