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The by- products formed are :

1. carbon-di-oxide 

2. water

Breathing is a simple physical process of drawing in air through the nostrils and expelling it out. 

Respiration is a chemical process which involves the breakdown of food and release energy. 

1. Ribs muscles—During inhalation, the ribs muscles contract and push the ribs upward and outward. During exhalation these relax and cause the ribs to return to original position. 

2. Diaphragm: During inhalation it becomes flattened while during exhalation it relaxes and moves up and back into convex (dome) shape.

Bowman’s capsule 

1. It is a part of kidney i.e. a excretory unit. 

2. It is cup shaped structure at the end of nephron. 

3. It helps in filtration of blood 

Alveolus 

1. It is a part of using i.e.a respiratory unit. 

2. It is the outgrowth of air sacs (alveolar sacs). 

3. It helps in exchange of gases (CO₂ and O₂).

The exchange of gases through moist skin and blood capillaries underneath is called cutaneous respiration

Breathing 

1. It is a physical process. 

2. Air containing oxygen is taken into the lungs and air loaded with carbondioxide is given out. 

3. Lungs are mainly involved. 

Respiration 

1. It is a catabolic process 

2. Oxygen taken in is used in oxidizing glucose and energy is released. 

3. Occurs in tissues and cells of the body.

Aerobic Respiration 

1. It takes place in the presence of oxygen. 

2. Complete oxidation of food takes place. 

3. 38 molecules of ATP are produced by oxidation of one gram mole of glucose. 

4. CO₂ and H₂O are the end products. 

Anaerobic Respiration 

1. It takes place in the absence of oxygen. 

2. In complete oxidation of food takes place. 

3. 2 molecules of ATP are produced by oxidation of gram mole of glucose. 

4. Ethyl alcohol (C₂H₂ OH) and CO₂are the end products.

ATP is the energy currency of cell its full form is Adenosine Triphosphate.

Aerobic respiration 

1. It occurs in the presence of oxygen 

2. It occurs inside the mitochondria. 

3. Complete oxidation of food takes place. 

4. The end products are CO₂ and water. 

5. 38 ATP molecules are produced by oxidation of one gram mole of glucose. 

Anaerobic respiration 

1. It occurs in the absence of oxygen. 

2. It occurs outside the mitochondria. 

3. In complete oxidation of food takes place. 

4. Ethyl alcohal or lactic acid are the end products. 

5. 2 ATP molecules are produced by oxidation of one gram mole of glucose.

The process of conversion of glucose molecules in food into energy rich molecules, carbondioxide and water with the help of oxygen is known as respiration.

urine, because it is excretory product of animals and rests are excretory products of plants

1. True

2. False. 

Respiration is a chemical process.

3. False. 

The oxidation of food to release energy and water is called Respiration.

4. True

5. False. 

The trachea branches into two tubes called bronchi.

6. False. 

The microscopic air sacs present in the lungs are called alveolar sacs.

7. False. 

The walls of alveoli are richly supplied with blood capillaries.

8. True

Respiration 

1. It is a complex bio-chemical process which involves enzymes. 

2. It involves oxidation of glucose in to CO₂, water and energy. 

3. Energy is released and stored in the form of ATP. 

4. It takes place inside the cell. 

Breathing 

1. It is a mechanical process without the involvement of enzymes. 

2. It involves only the exchange of oxygen and CO₂. 

3. No energy is released. 

4. It takes place outside the cell.