Describe the changes in the lungs during inspiration

During inspiration, the intercostal muscles contract, moving the sternum up and out. This increases the thoracic volume, hence decreasing the pressure. The pressure gradient set up causes air inflow from outside. The diaphragm also flattens to increase the thoracic volume further.

Answered by Dhaval N. Biology tutor

2032 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

How did Meselson and Stahl provide evidence for semi-conservative replication?


How does the Calvin Cycle work?


Explain 3 ways in which a leaf is adapted for photosynthesis. [6 marks]


Explain how an action potential is transmitted across a cholinergic synapse.


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2024

Terms & Conditions|Privacy Policy
Cookie Preferences