Blood

Question 1

What are the four main parts of the blood?

Answer 1

1. Plasma (55%)
2. Platelets (1%)
3. White blood cells (>1%)
4. Red blood cells (44%)

Question 2

What is plasma?

Answer 2

Straw coloured liquid that transports carbon dioxide, glucose, urea, digested food, hormones and sodium ions around the body

Question 3

What are platelets?

Answer 3

Cell fragments that clot the blood, which stops blood loss and prevents infection

Question 4

What are the two main types of white blood cell?

Answer 4

Phagocytes and Lymphocytes

Question 5

What is the role of phagocytes?

Answer 5

Form the immune system, detect foreign antigens, engulfs pathogens, uses enzymes to digest pathogens and expel harmful waste products from the cell

Question 6

What is the role of lymphocytes?

Answer 6

To produce antibodies specific to the antigen, which attach to complimentary antigens, which neutralises the pathogen

Question 7

What is the role of red blood cells?

Answer 7

To carry O2 around the body

Question 8

What are the adaptations of the red blood cell that make them suitable for the transportation of oxygen?

Answer 8

-Biconcave shape
-Which gives them a large surface area for absorbing oxygen
-No nucleus, so more space for oxygen