The Circulatory System - The Blood

Question 1

Is a blood a tissue?

Answer 1

Yes

Question 2

What are the four main things in blood??

Answer 2

Red blood cells
White blood cells
Platelets
Plasma

Question 3

What to red blood cells carry?

Answer 3

Oxygen

Question 4

What is the job of red blood cells?

Answer 4

Carry oxygen from the lungs to all the cells in the body

Question 5

What shape to red blood cells have? Why?

Answer 5

Biconcave shape to give a large surface area for absorbing oxygen

Question 6

Do red blood cells have a nucleus? Why?

Answer 6

No, more room to carry oxygen

Question 7

Red blood cells contain a red pigment called…

Answer 7

Haemoglobin

Question 8

In the lungs, haemoglobin combines with [ ] to become [ ]

Answer 8

oxygen

oxyhaemoglobin

Question 9

In blood tissues - oxyhaemoglobin splits into [ ] and [ ], to release [ ] to the cells

Answer 9

haemoglobin
oxygen
oxygen

Question 10

What do white blood cells do?

Answer 10

Defend against disease

Question 11

White blood cells can change shape to engulf unwelcome [ ]

Answer 11

microorganisms

Question 12

What to white blood cells produce to fight microorganisms? what do they produce to neutralise any toxins produced by microorganisms?

Answer 12

Antibodies

Antitoxins

Question 13

Do white blood cells have a nucleus?

Answer 13

Yes

Question 14

What do platelets do?

Answer 14

Help blood clot

Question 15

What are platelets?

Answer 15

Small fragments of cells with NO nucleus

Question 16

Why do platelets need to help blood clot around a wound?

Answer 16

To stop blood pouring out and to prevent microorganisms from enetring

Question 17

What can a lack of platelets cause?

Answer 17

Excessive bleeding and bruising

Question 18

What does plasma do?

Answer 18

Carries everything in the blood

Question 19

What does plasma carry?

Answer 19

red blood cells, white blood cells, platelets, glucose, amino acids, CO2, Urea, Hormones, antibodies and antitoxins