Solubility of carbon dioxide is ____ than oxygen.

The signal for voluntary muscle for forced breathing starts in __

A fish which is taken and brought to land dies within a few minutes because of _____

Aquatic arthropods and mollusks use which organ for respiration?

Which organism classification can breathe through moist skin?

Contraction in diaphgram causes increase in thoracic volume in the _____

Which one of the following changes takes place during inspiration?

Which one of the following is secreted by Pnuemocyte type-II cells?