The Circulatory System- The Blood

Question 0

What is the job of the red blood cells?

Answer 0

Carry oxygen from lungs to all cells in body.

Question 1

Name the four main things blood contains

Answer 1

Red blood cells white blood cells plasma and platelets

Question 2

How is the red blood cell suited to its role?

Answer 2

Biconcave disk shape- large SA to absorb oxygen
Contain haemoglobin- this contains iron and combines with oxygen in the lungs and releases oxygen in cells.
no nucleus- more room for haemoglobin

Question 3

What is the job of white blood cells

Answer 3

Defend against disease

Question 4

How are white blood cells suited to their role?

Answer 4

Change shape- eat microorganisms
Produce antibodies- fight microorganisms
Produce antitoxins- neutralise toxins from microorganisms

Question 5

What is the job if platelets

Answer 5

Small fragments of cells that help blood clot. Without them you have excessive bleeding or bruising

Question 6

What is the job of plasma

Answer 6

Yellow fluid that transports everything in blood like red and white blood cells platelets nutrients e.g glucose, carbon dioxide, urea, hormones and antibodies