Which Animal Has No Brain and Heart?

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Detailed Solution

Simple answer: The animal that has no brain and no heart is the starfish. Other examples include jellyfish, sea sponge, and corals.

Some simple aquatic animals survive without a brain or heart because their body structure and life functions are very basic. These animals rely on simple networks of cells to carry out body functions like feeding and movement. They do not need complex organs like a heart or brain because their bodies are designed to absorb oxygen and nutrients directly from water.

Examples of Animals Without Brain and Heart

Animal	Special Feature
Starfish	Has a simple nerve ring instead of a brain
Jellyfish	Moves using nerve nets and contracts body to swim
Sea Sponge	No organs, absorbs nutrients through pores
Corals	Stationary and depend on symbiotic algae for energy

These animals show that life can exist in very simple forms. They perform vital processes like feeding and respiration through diffusion or specialized cells, not through organs like the brain or heart.

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