How do sponges live without brains, hearts, or blood?

Sponges are extremely simple, porous, colony-type filter-feeders that live in seawater. It's like asking how algae can live without leaves, xylem and phloem. read more

Sponges are extremely simple, porous, colony-type filter-feeders that live in seawater. It's like asking how algae can live without leaves, xylem and phloem. read more

The thing is, while jellyfish don’t have a brain or central nervous system, they do have a very basic set of nerves at the base of their tentacles. These nerves detect touch, temperature, salinity etc. and the jellyfish reflexively respond to these stimuli. read more

For example, jellyfish are interesting sea creatures that have managed to survive on Earth for around 650 million years without a brain, heart, or blood. Some of the other animals that survive without brains include the sea star, sea cucumber, sea lily, sea urchin, sea anemone, sea squirt, sea sponge, coral, and Portuguese Man-O-War. read more

Sponges have the ability to produce their own food. More facts about the sponges body. There are more then 5000 species of sponges. A sponge has a dark membrane which covers the sponge while acts like skin and protects the inner soft skeleton. Sponges settles on the ocean floor ad will grow up to be a adult sponge. Facts about a sponges prey. read more