Revision

Question 0

Are all cells in the body the same?

Answer 0

Cells are not the same. There are millions of different kinds of cells with different formations, sizes and particular jobs to do in the body. However, cells in the human body have a similar basic structure.

Question 1

Explain the relationship between organisms tissues, cells, organs and systems.

Answer 1

A cell is a single unit of an organism. When many cells form together, tissues are formed. When loads of tisssues form together, organs are formed. When organs work with other organs in our body, a system is formed. When there are groups of systems, organisms are formed.

Question 2

What are the inputs and outputs of respiration?

Answer 2

Inputs: Glucose & Oxygen
Outputs: Carbon Dioxide & Water & Energy

Question 3

Respiration equation?

Answer 3

Glucose + Oxygen → Carbon Dioxide + Water + Energy

Question 4

What is the purpose of respiration?

Answer 4

To control breathing.

Oxygen in, carbon dioxide out.

Question 5

Parts of respiratory system?

Answer 5

Lungs
Trachea
Diaphragm 
Nose
Mouth

Question 6

What do the lungs do in the respiratory system?

Answer 6

They move oxygen into the body and carbon dioxide out.

Question 7

What does the trachea do in the respiratory system?

Answer 7

The trachea filters the air we breathe

Question 8

What’d does the diaphragm do in the respiratory system?

Answer 8

The diaphragm controls breathing. When you inhale,it flattens out and pulls forward, making more space for the lungs. When you exhale, the diaphragm expands and forces air out.

Question 9

What do the nose and mouth do in the respiratory system?

Answer 9

Air comes into and out of the body from the nose and mouth

Question 10

Describe the purpose of the respiratory system

Answer 10

The primary role of the respiratory system is to transport air into the lungs and to facilitate the diffusion of oxygen into the blood stream. This system also receives waste carbon dioxide from the blood and exhales it.

Question 11

What is meant by breathing?

Answer 11

The process of taking air into and expelling it from the lungs.

Question 12

Do insects, fish and worms breath as humans do?

Answer 12

They do breath but not the same way humans do.
Insects breath by spiracles.
Fish breath by gills.
Slugs breath by skin.

Question 13

What is the main purpose of the digestive system?

Answer 13

To break down the food that you eat into smaller parts and get the nutrients from these foods, which helps to carry out various functions in the body.

Question 14

What is meant by peristalsis?

Answer 14

Rhythmic muscle movements to force food from the throat into the stomach.

Question 15

What is an enzyme?

Answer 15

Substances that speed chemical reactions.

They can help break down lipids and protein.

Question 16

What is meant by chemical digestion?

Answer 16

A chemical process where the chemicals in food are changed into different chemicals that are soluble in water.

Question 17

What is meant by mechanical digestion?

Answer 17

A physical process that breaks food into smaller pieces.

Eg: teeth chewing, stomach contracting.

Question 18

What is the main job of the circulatory system?

Answer 18

To transport oxygen and nutrients around the body.

Question 19

List six parts of the heart.

Answer 19

Possible answers:
Aortic arch                          
Right pulmonary vein 
Superior vena cava            
Right pulmonary artery 
Right atrium 
Tricuspid valve
Right ventricle
Left pulmonary artery 
Left pulmonary vein
Inferior vena cava
Mitral valve
Aortic valve 
Left ventricle 
Descending aorta 
Left atrium