Respiratory system

Question 1

Have birds got large or small lungs?

Answer 1

Small lungs

Question 2

What is their respiratory cycle?

Answer 2

4 step, 2 breath cycle

Question 3

What kind of airflow do they have?

Answer 3

• Unidirectional

Question 4

How many air sacs do birds have?

Answer 4

9 air sacs

Question 5

How would you describe a birds bones?

Answer 5

Pneumatized (hollow, spongy or honeycomb)

Question 6

Where is the vocalisation of a bird made through?

Answer 6

Syrinx

Question 7

What is the 4 step of the breathing cycle?

Answer 7

1- 1st breath in (inhalation) = when they breathe in it goes straight to the back end (posterior). It’s stored here until they need to exhale
2- When they exhale the air foes into the lungs and stays there until they take their second breathe
3- this is the 2nd inhalation. However the air in the lungs now goes into the anterior air sacs.
4- the 2nd exhalation is the last step in the process this is where the air from the anterior air sacs go from them up and out of the mouth.

Question 8

What are the air sacs called?

Answer 8

9 air sacs
Anterior sacs (interclavicular, cervicular and anterior thorasics)
Posterior sacs (posterior thorasics and abdominals)