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Flashcards in blood Deck (10)
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1
Q

What do red blood cells do?

A
  1. Transport oxygen round the body

2. Contain haemoglobin

2
Q

How are red blood cells adapted to the job?

A
  1. Don’t have a nucleus so more room for oxygen

2. Large surface area (donut shape)

3
Q

What do capillaries do?

A
  1. Deliver food and oxygen to body tissues
  2. Remove CO2 and waste
  3. Walls one cell thick (easy for diffusion)
4
Q

What is haemoglobin?

A

Chemical in red blood cells that combines reversibly with oxygen to make oxyhaemoglobin

5
Q

What is plasma?

A

Liquid watery part of blood which carries:

  1. red and white blood cells and platelets
  2. nutrients
  3. CO2 to lungs
  4. urea to kidneys
  5. hormones
  6. antibodies produced by white blood cells
6
Q

What do veins do?

A
  1. collect the “used” blood and carry the blood back to the heart at low pressure
  2. pulmonary vein is the exception- carries oxygenated blood from lungs to heart
7
Q

What do arteries do?

A
  1. Carry oxygenated blood away from the heart at high pressure
  2. Pulmonary artery is the exception - carries deoxygenated blood from heart to lungs
8
Q

What do white blood cells do?

A

Fight micro organisms that cause disease

  1. Consume foreign cells
  2. Produce antibodies
  3. Produce anti toxins
9
Q

What are two types of white blood cells?

A
  1. Phagocytes - ingest pathogens

2. Lymphocytes- produce anti bodies

10
Q

What are platelets?

A

Fragments of larger cells that help blood to clot at a wound