Question:
Listen How can cnidarians such as sea jellies survive in the
Last updated: 7/4/2023
Listen How can cnidarians such as sea jellies survive in the water with no gills or lungs they must periodically rise to the surface to get air their cells don t need oxygen since they move so little they have special oxygen pumps in their cells their body walls are extremely thin they don t have a nervous system which required a lot of oxygen