Revision

Question 1

what carries oxygenated blood from the heart to the rest of the body?

Answer 1

Arteries

Question 2

what carries de-oxygenated blood from the body back to the heart?

Answer 2

Veins

Question 3

What are the smallest vessels and carry both oxygenated and de-oxygenated blood?

Answer 3

Capillaries

Question 4

What is Plasma?

Answer 4

Blood Plasma is:

• a yellowish colour liquid
• carries waste, nutrients and carbon dioxide

Question 5

What do Erythocytes do?

Answer 5

(red blood cells)

• carry fresh oxygen throughout the body
• are found with a flattish indented centre like doughnuts without a hole
• haemoglobin is the protein in red blood cells that carry oxygen
• red blood cells also remove co2 from your body

Question 6

what is the function of Leucocytes?

Answer 6

(White Blood cells)
- only account for about 1% of your blood
-there are different types of white blood cells;
lymphocytes
granulocytes
monocytes
They perform phagocytosis

Question 7

what is phagocytosis?

Answer 7

Destroying dead cells, debris + foreign bodies like bacteria

Question 8

What is the function of thrombocytes (platelets)

Answer 8

Platelets will clot a damaged area so that it can heal without excess blood loss

Question 9

what do veins carry?

Answer 9

de-oxygenated blood

Question 10

what do arteries carry?

Answer 10

oxygenated blood

Question 11

What are the functions of the blood?

Answer 11

• Transportation
• defence
• regulation
• clotting

Question 12

What are the main Constituents of blood?

Answer 12

Plasma
Red blood cells (erythrocytes)
White blood cells (leucocytes
Platelets (thrombocytes)
Other Chemicals - hormones

Question 13

what is the heart?

Answer 13

muscular organ that pumps blood around the body

Question 14

what are arteries?

Answer 14

the blood leaves the heart in these large elastic tubes

Question 15

What Carotid artery?

Answer 15

the blood to the head arrives via these arteries (one on either side of the neck)
These arteries divide into smaller branches- internal carotid and external carotid

Question 16

what branches does the external carotid divide into?

Answer 16

three branches
-occipital branch (supplies the back of the head and scalp)
temporal branch (supplies the sides of the face and skin)
facial branch (supplies muscles and tissues of the face)