bio(human

Question 1

important features of transport system to speed up the rate of diffusion of human body

Answer 1

• large surface area to volume ratio

- membrane about 1 to 2 cells in thickness

Question 2

what is blood made up of

Answer 2

1. red blood cell(<45%)
2. white blood cell
3. platelets
4. plastma(55%)

Question 3

red blood cell features and function

Answer 3

features
-has no nucleus
function
-red blood cell carries oxygen around the body

Question 4

white blood cell features and functions

Answer 4

features
-fewer but larger than the red blood cells
-colourless
function
-fight infect and defend the body agaisnt other foregin

Question 5

function and features of platelets

Answer 5

features
-tiny pieces of blood cell
function
-help blood to clot when we bleed

Question 6

what is double circulation

Answer 6

heart——– >lungs—— >heart

heart—– >rest of body—- >heart

Question 7

right side or left side of the heart is oxygenated blood

Answer 7

left side

Question 8

upper chamber is know as ?

Answer 8

atrium

Question 9

lower chambers is known as

Answer 9

ventricle

Question 10

location for septum and its function

Answer 10

the septum is at a wall down the middle,divides the heart into 2 halves
it prevent deoxygenated blood from mixing with oxygenated

Question 11

three types of blood vessel

Answer 11

artery,capillary,vein

Question 12

function for artery

Answer 12

• carries blood away from heart

- blood within the arteries flow under high pressure

Question 13

function for vein

Answer 13

-carry blood back towards the heart

Question 14

function for capillary

Answer 14

-exchange of substances between the blood and cells take place at the capillaries.