Jellyfish have a single opening that serves as both their mouth and anus.

Sponges have specialized cells that allow them to expel waste without a dedicated anus.

[{"selector":"#anim-9a42056e-6994-418c-bd39-d805e1ac876e [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-36.16730891039693%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}]

Some members of the cnidarian group, like corals and sea anemones, lack a separate anus.

[{"selector":"#anim-97215a05-a656-46f0-a106-f311c49431aa [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-40.34957581182541%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}]

Flatworms

[{"selector":"#anim-e4daaa28-ef68-4537-b7a1-7b41340469c4 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-37.12926393835337%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}]

Tapeworms

[{"selector":"#anim-2a332310-f217-4f8b-b9b7-33cc443d7d2d [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-22.729863045000204%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}]

Roundworms

[{"selector":"#anim-91619179-d085-4f00-a481-bd70a7a2a2cb [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-45.08413254108689%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}]

Comb Jellies

[{"selector":"#anim-0e397394-76fc-42f9-8264-f186c6631533 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-30.521112364224212%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}]

Rotifers

[{"selector":"#anim-fe07eb4e-2cb3-4d01-921a-ba6a9d7ca085 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-18.353056710528243%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}]

Related Stories Reasons Why People Migrate Traits of a Manipulator Daily Horoscope All Zodiac Sign Aug 29 5 Low-GI superfoods for long-lasting energy

Jellyfish have a single opening that serves as both their mouth and anus.

Jellyfish

Sponges have specialized cells that allow them to expel waste without a dedicated anus.

Sponges

Some members of the cnidarian group, like corals and sea anemones, lack a separate anus.

Cnidarians

Flatworms

Certain flatworms use a simple system of branched tubes to distribute nutrients and expel waste.

Tapeworms

Tapeworms absorb nutrients directly through their skin, eliminating the need for a separate anus.

Roundworms

Nematodes have a complete digestive tract but often lack a distinct anus.

Comb Jellies

Some ctenophores have a single opening for both eating and waste expulsion.

Rotifers

These microscopic animals use a specialized structure called the "mastax" to process food and eliminate waste.