Select the odd one out. Give reason for your choice:

The correct option is C

Skin

The correct option is C:

Explanation of the correct option:

1. Skin is the largest organ of the body and is involved in the maintenance of body temperature.
2. Skin is not part of the respiratory system and no gaseous exchange occurs through the skin in humans.

Explanation for incorrect options:

Option A:

1. Alveoli are small cup-shaped structures that provide the site of gaseous exchange between the lungs and the blood.

Option B:

1. Lungs are present in the thoracic cavity and are responsible for respiration in humans.
2. They also have a significant role in the protection of the body against infection from pathogens.

Option D:

1. Bronchi are the main respiratory airways found in the lungs.
2. They are responsible for the conduction and cleaning of the air present in the respiratory pathway.

Option E:

1. Bronchioles are the smallest airways present in the lungs.
2. It is directly linked to the alveoli.
3. Bronchioles functions in the air conduction and gaseous exchange in the lungs.

Final answer: Skin is the odd one out.