The hydra takes in nutrition through the use of tentacles. The muscles of the organism absorb the nutrients as there is no circulatory, respiratory or urinary system.
by taking meteor sized poops then eating it until it gets a stiffy
they feed by using the cnidocytes on its tentacles to shoot the nematocyst at prey (which paralyzes prey) then it moves the prey to its mouth and engulfs it
by engulfing it
with it's stinger
A hydra removes undigested food the same ways it takes in food. A hydra takes in it's food through it's tentacles, so it removes food the same way because it's like a pipe stuck in the ground and there is only one way in and one way out.
Eat it
Animals ingest their food while fungi grow into it.
absorbs the food!
To "ingest."
Diffusion
Hydra's live sybiotically with Chlorella(Green Algae). The Chlorella provides food for the Hydra and is still alive, this explaining the green pigmentation in Certain Hydra's.
Animal
No, they perform photosynthesis.
cytostome
salmonella
gizards