the blood

Question 1

what is the function of the blood

Answer 1

Blood transports materials and heat around the body, and helps to protect against disease

Question 2

what is the blood made up of?

Answer 2

plasma, red and white bloode cells and platelets

Question 3

plasma function

Answer 3

Transporting carbon dioxide, digested food, urea, hormones and heat

Question 4

red blood cells function

Answer 4

transporting oxygen for aerobic respiratiob

Question 5

white blood cells function

Answer 5

ingesting pathogens and producing antibodies

Question 6

platelets function

Answer 6

involed in blood clotting

Question 7

adaptations of red blood cell (diffusion of oxygen)

Answer 7

they contain haemoglobin - red protein that combines with oxygen. no nucleus so they can contain more haemoglobin. small and flexible so can fit through narrow blood vessels. biconcave shape to maximise their surface area for oxygen absorption

Question 8

reversible oxygen and haemoglobin reaction

Answer 8

haemoglobin + oxygen oxyhaemoglobin

Question 9

how are platelets involved in blood clotting

Answer 9

enzyme controlled reactions convert fibrinogen into fibrin. network of protein fibres that capture many red blood cells and platelets form a clot that stops you from bleeding to death. clot dries and hardens to form scab, protects new skin while growing. stops bacteria entering body through wound