blood tissue

Question 1

structure of blood

Answer 1

it is salty , slightly sticky and reddish fluid .

Question 2

what is the pH of blood

Answer 2

it is a little over 7 making it a alkali solution

Question 3

what i the average amount of blood that humans have

Answer 3

5-6 litres of blood

Question 4

what 55% of the blood made up of

Answer 4

liquid substance called blood plasma

Question 5

what is 45 % of the blood made up of

Answer 5

blood corpuscles

Question 6

what is the liquid blood plasma made of

Answer 6

90% of water and 10% of dissolved substances

Question 7

what does the dissolved substances include

Answer 7

digested food , salt , gases , excretory wastes , plasma proteins ,hormones , enzymes and antibodies

Question 8

what is the function of antibodies

Answer 8

they protect the body against diseases from microbes

Question 9

what are microbes

Answer 9

micro -organisms which cause diseases

Question 10

give an example of plasma protein.

Answer 10

fibrinogen

Question 11

what is the function of fibrinogen

Answer 11

helps in the clotting of blood

Question 12

how many typed of corpuscles are there

Answer 12

three types

Question 13

name the three types of corpuscles

Answer 13

red blood corpuscles or erythrocytes, white blood corpuscles or leucocytes and blood platelets

Question 14

structure of erythrocytes

Answer 14

disc-shaped and have no nuclei and contain the pigment haemoglobin

Question 15

function of haemoglobin

Answer 15

haemoglobin gives blood its red colour

Question 16

the structure of leucocytes

Answer 16

irregularly shaped and have nuclei

Question 17

the structure of platelets

Answer 17

fragments (broken off pieces ) of cells without nuclei

Question 18

fuction of blood plasma

Answer 18

it acts as a transport meduim for :
1. digested foof substances such as glucose and amino acids
2. excretory productus such as urea and uric acid
3. plasma proteins such as fibrinogen which play an important part in hte clotting of blood
4. salts
5. gases such as oxygen and carbon dioxide
6. hormones and enzymes

Question 19

function of erytrocy

fuction of erytrocytes

Answer 19

the oxygen is dissolved in the haemoglobin and forms oxyhaemoglobin befor being transported

main functin is to transport oxygen

Question 20

function of leucocytes

Answer 20

proctects the body in the following ways :
1. they engulf the microbes
2. they may form barries against microbes
3. they may produce antibodies to destroy the micobes

Question 21

function of the blood platelets

Answer 21

plays an important role in blood clotting

Question 22

function of the blood system

Answer 22

1. it absorbs digested food from the alimentary canal and transports it to all parts of the body
2. it absorbs oxygen in the lungs and transports it to all the parts of the body
3. it transports excretory wastes to the excretory organs (kidney, skin , lungs and sweat glands )