Gas Exchange In Insects

Question 1

What is the circulatory system in insects?

Answer 1

• They have an open circulatory system
• Heart pumps blood line liquid that provides nutrients and removes waste products.

Question 2

Where is the main site of gas exchange?

Answer 2

• Tracheae

Question 3

What does the trachea extend into?

Answer 3

• They extend into tracheae’s and then the insects muscle tissue

Question 4

What is a spiracle?

Answer 4

A tiny opening at the end as a trachea, they open and close to control the entry exit of gases.

Question 5

Where are trachea found?

Answer 5

• insects abdomen /thorax

Question 6

How does the insect draw air into the trachea?

Answer 6

To draw air into the trachea the insects expands its abdomen

Question 7

What happens after the insect expands its abdomen?

Answer 7

This increases the volume of the thorax which creates a pressure gradient for the air flow into the trachea and all the way into the tracheoles, where gas exchange occurs.

Question 8

What are the adaptations for efficient gas exchange in insects?

Answer 8

-Short diffusion pathway
- large surface area
- concentration gradient of oxygen and carbon dioxide
- faster diffusion into the muscle tissue
-large surface area to volume

Question 9

Explain short diffusion pathway

Answer 9

-wall of tracheole ends only one cell thick.

Question 10

Explain large surface area

Answer 10

• Highly branched large number of tracheoles.