animal transport

Question 1

red blood cells

Answer 1

• transport oxygen in blood
• contains haemoglobin which binds with oxygen to form oxyhemoglobin
• biconcave shape which maximises surface area, no nucleus

Question 2

white blood cells

Answer 2

• part of the immune system
• contains phagocytes which engulf and digest pathogens through phagocytosis
• contains lymphocytes that produces antibodies which destroy pathogens

Question 3

arteries

Answer 3

• carry blood away from the heart
• thick, elastic aged walls to withstand high pressure

Question 4

veins

Answer 4

• carry blood to the heart
• contain valves which prevents back flow of blood

Question 5

capillaries

Answer 5

• low blood pressure
• one cell thick to allow gas exchange

Question 6

platelets

Answer 6

• stop us from bleeding & help healing process
• circulate around blood and clump when damaged blood vessels founded

Question 7

plasma

Answer 7

• liquid component of blood
• transports CO2, hormones, urea, digested food