Animals Who Have No Heart

Orange Lightning

These animals have evolved various mechanisms to survive without a traditional heart, often relying on their unique body structures.

1

Jellyfish

Jellyfish are simple marine animals that lack a centralized heart.  Instead, they have a diffuse network of cells and a gelatinous body.

2

Sponges

Sponges are primitive aquatic animals that don't have a heart or a circulatory system, they rely on the movement of water.

3

Flatworms

Flatworms, such as planarians, don't possess a heart. Their flat, thin bodies allow for direct diffusion of gases.

4

Cnidarians

This group includes corals and sea anemones. Like jellyfish, they lack a heart and rely on a simple gastrovascular cavity.

5

Sea Cucumbers

While sea cucumbers have a simple tube-like body structure, they don't have a heart. they rely on their coelomic fluid.

6

Nematodes

Nematodes do not have a heart, their pseudocolour  helps to transport nutrient.

7

Hydra

A small, fresh-water organism related to jellyfish and corals, hydras have no heart.