Insect Respiratory System Concepts

The video explains the insect respiratory system, focusing on the tracheal system, spiracles, tracheal tubes, and tracheoles. It describes how air enters through spiracles, travels through the tracheal system, and reaches tracheoles for gas exchange. The video also covers the role of taenidia in supporting tracheal tubes and the function of air sacs. It distinguishes between passive diffusion in small insects and active ventilation in larger ones, highlighting how insects manage air flow and water loss.

What is the primary function of the insect tracheal system?

• To excrete waste

• To regulate temperature

• To transport oxygen to cells

• To digest food

How do spiracles help in reducing water loss in insects?

• By increasing air flow

• By secreting a waterproof substance

• By closing to prevent water escape

• By absorbing water from the air

Which part of the insect respiratory system is responsible for allowing air to enter?

• Tracheoles

• Taenidia

• Air sacs

• Spiracles

What is the role of taenidia in the tracheal tubes?

• To store energy

• To provide structural support

• To transport nutrients

• To aid in digestion

What is the purpose of air sacs in the insect respiratory system?

• To store air for later use

• To produce sound

• To filter impurities

• To regulate body temperature

What structural feature prevents the tracheal tubes from collapsing?

• Tracheoles

• Taenidia

• Air sacs

• Spiracles

Where does gas exchange occur in the insect respiratory system?

• In the air sacs

• In the tracheoles

• In the tracheal tubes

• In the spiracles

How does air move through the tracheal system in small insects?

• Through external pressure

• Through active ventilation

• Through passive diffusion

• Through muscular contraction

What happens during active ventilation in larger insects?

• The spiracles close to conserve water

• The air sacs release stored oxygen

• The tracheal tubes expand to store air

• The abdomen contracts to expel air

What is the main difference between passive diffusion and active ventilation?

• Active ventilation involves muscular movement, passive diffusion does not

• Passive diffusion occurs in larger insects, active ventilation in smaller ones

• Active ventilation is slower than passive diffusion

• Passive diffusion requires energy, active ventilation does not