Circulatory System - Blood

Question 1

How does the red blood cells carry oxygen?

Answer 1

The cells have large surface area
No nucleus 
Haemoglobin
Oxyhaemoglobin
Biconcave disc 

These are to carry more oxygen
Carry iron
Absorb oxygen

Question 2

What do white blood cells defend against? And how?

Answer 2

They defend against infections, this happens when the white blood cells multiply to fight it off, so a blood test would have many white blood cells.

Question 3

What are the two white blood cells?

Answer 3

Phagocytes - white blood cells that engulf microorganisms , phagocytosis

Lymphocytes - white blood cells that produce antibodies against microorganisms . They also produce antitoxins to neutralise any toxins produced by the microorganisms

Question 4

How do platelets help clots?

Answer 4

No nucleus , stop microorganisms getting in,

A lack of these can cause excessive bleeding and bruising.

Question 5

What is plasma?

Answer 5

Plasma makes the blood like a blood substance, it carries everything inside the bloodstream, including

Red and white blood cells
Platelets
Glucose 
Amino acids
Carbon dioxide
Urea
Hormones
Proteins
Antibodies
Antitoxins