simplified

Digestive system of bird using domestic chicken, in diagram format, with close up of gizzard

Woodpecker skull with hyoid horns diagram, viewed in profile

Colour diagram of the process of transpiration, showing how plants access water from their roots and bring it up to the leaves

Photosynthesis diagram annotated with labels,explaining the process

Red ant Mymrica Rubra swift ink sketch with red wash and stippling