100+ Co2 o2 tissue PowerPoint (PPT) Presentations, Co2 o2 tissue PPTs

Co2 o2 tissue - PowerPoint PPT Presentation

Respiratory System

In simple animals, like Platyhelminthes (flatworms), respiration is done by diffusion of oxygen. In annelids, oxygen diffuses from moist soil into skin cells Insects have tiny openings called spiracles and special tubes called tracheae Fish use gills Land animals use lungs.

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Co2 o2 tissue - PowerPoint PPT Presentation

Respiratory System