Chloride shift occurs in response to _____

In the trachea _____ ‘C’ shaped cartilagenous rings are present.

Which one of the following changes takes place during inspiration?

Decrease in thoracic volume is marked by________

Bulk of carbon dioxide is transported by ______

Earthworms respire through organs called as __

Aquatic arthropods and mollusks use which organ for respiration?

Pleura is ___ layered.