Insect Tracheal System Concepts

Insects breathe through spiracles, small openings on their body, which lead to a network of tubes called the trachea. This tracheal system facilitates the exchange of gases, allowing oxygen to reach cells and carbon dioxide to be expelled. The process ensures efficient respiration in insects.

What are the small openings on the sides of an insect's body called?

• Trachea

• Spiracles

• Gills

• Lungs

What do spiracles connect to inside an insect's body?

• Blood vessels

• Nervous system

• Digestive tract

• Tracheal tubes

What is the primary function of the tracheal system in insects?

• Digesting food

• Facilitating gas exchange

• Circulating blood

• Reproducing cells

How does oxygen reach the cells in an insect's body?

• Through the blood

• Via the digestive system

• Through the tracheal system

• By diffusion through the skin

How is carbon dioxide expelled from an insect's body?

• By the circulatory system

• Through spiracles

• Via the digestive system

• Through the skin