Ventilation In Insects

Question 1

Insects do not possess a transport system, therefore O2 has to be transported directly to tissues / cells undergoing mitosis. Why is this?

Answer 1

As they have a tough exoskeleton through which little exchange can occur

Question 2

How do insects transport their O2 then

Answer 2

Using spiracles
Trachea
& tracheoles

Question 3

What are spiracles

Answer 3

Small openings of tubes along the thorax / abdomen
-> these run into the body of an insect & supply it with required gases
- @ the end of each of tracheole = tracheal fluid, which allows gases to dissolve & then diffuse into cells

Question 4

To avoid excessive H2O loss, what can spiracles do

Answer 4

Be opened & closed

Question 5

Insect ventilation steps

Answer 5

Question 6

Insect gas exchange steps

Answer 6

Question 7

Mammal vs insect trachea

Answer 7

Mammals = 1 trachea vs insects = multiple
Mammals = cartikage vs insects = chitin
Mammal trachea = longer & larger diameter