19th century illustration of a growing sponge. Sponges are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, most rely on maintaining a constant water flow through their bodies to obtain food and oxygen and to remove wastes. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Parker, David |
Bildgröße: | 4731 px × 6537 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |