blood and blood vessels

Question 1

what does blood do? (4)

Answer 1

transports substances
defend against pathogens
controls body temperature
maintain pH of fluid

Question 2

what does plasma do?

Answer 2

transports the cells

Question 3

what do platelets do?

Answer 3

they form clots to stop bleeding

Question 4

what do white blood cells do?

Answer 4

protects the immune system to prevent infections

Question 5

what do red blood cells do?

Answer 5

carry oxygen from the lungs to the rest of the body

Question 6

what are characteristics of blood cells? (2)

Answer 6

no nucleus or organelles to maximise space for haemoglobin
they have a large amount of haemoglobin for carrying more oxygen

Question 7

what do arteries do?

Answer 7

carry blood away from heart

Question 8

what do veins do?

Answer 8

carry blood to the heart

Question 9

what do capillaries do?

Answer 9

connect arteries and veins

Question 10

what do intercostal muscles do when inhaling?

Answer 10

contract and move the ribs up and out

Question 11

what do intercostal muscles do when exhaling?

Answer 11

relax and move the ribs in and down

Question 12

what do red blood cells do at the lungs?

Answer 12

they pick up up oxygen which forms- oxygen + haemoglobin = oxyhaemoglobin

Question 13

what do red blood cells do at body tissues?

Answer 13

they drop of oxygen- oxyhaemoglobin = oxygen + haemoglobin