Cnidaria
The phylum cnidaria is a phylum consisting of many known animals, such as the coral and jellyfish. It is an aquatic animal that differs in the respiratory system from many other phylums. Although jellyfish do not have any gills or organs for breathing, they are still completely able to inhale oxygen.
Coral (Anthozoa)
The phylum cnidaria is a phylum consisting of many known animals, such as the coral and jellyfish. It is an aquatic animal that differs in the respiratory system from many other phylums. Although jellyfish do not have any gills or organs for breathing, they are still completely able to inhale oxygen.
Coral (Anthozoa)
Corals are calcium carbonated animals that live at the bottom of the ocean. Respiration is used in the coral when carbon dioxide is released in the atmosphere and oceans. The coral removes the byproduct oxygen during the day when photosynthesis is occurring, thus helping it breathe. However, at night, respiration takes place, and the coral then use the carbon dioxide to breathe. More oxygen is produced than absorbed by the coral, so they end up with a surplus of oxygen.
Jellyfish (Scyphozoa)
Jellyfish are free swimming marine animals who possess tentacles that can sting. Much like coral, jellyfish breathe by using oxygen. From the outer layers of the jellyfish, the oxygen is absorbed into the jellyfish. Although the jellyfish have no circulatory or respiratory system, it still breathes by sucking in oxygen through their skin and through diffusion. As the jellyfish swim, the oxygen is absorbed into their first layer of skin, called the ectoderm. Then, it goes through to the second layer, called the endoderm. The oxygen molecules are used and excess oxygen is released as carbon dioxide.
Box Jellyfish (Cubozoa)
The Box Jellyfish is very similar to the regular jellyfish. The Box Jellyfish are among the most venomous animals on the planet. Similarly to the jellyfish, they breathe through their bodies. They use their internal cavity called the coelenteron to inhale the necessary oxygen. Also, their cells are able to absorb oxygen and extract carbon dioxide from their bodies. The walls of the body are so thin the oxygen is easily able to slip right into the internal organs of the box jellyfish.