Circulation Immunity & Gas Exchange

Answer of Question of Circulation Immunity & Gas Exchange

Q. 26. What are the five types of respiratory surfaces animals use for external i   respiration?

An s. Protists and animals have the following main types of respiratory surfaces:

i) Simple diffusion across plasma membranes as in protozoans, poriferans, cnidarians, flatworms.

ii) Trcheae which are chitin lined tubes in which air circulates as in insects, centipedes, ticks, some mites, and spiders.

Hi)  Integument or body surface as in earthworms.

iv) Gills as in sea st



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