The First Living Organisms
Level of Organization
Sponges have cellular level organization which means their cells are specialized to perform different functions.
Sponges are the only animals with just one germ layer.
A sponge has neither radical symmetry nor asymmetrical symmetry. Sponges grow in many different shapes and sizes.
Sponges do not undergo cephalization because they do not have a brain.
The body cavity of sponges is large, it is open to the outside world, and it allows the sponge to consume food.
A sponge takes in food from the water that flows through their pores. The sponge filters out the small food particles within the water.
The sponge gets the food and oxygen it needs from the water flow through its pores.
The sponge take water through its pores and the oxygen from the water is used.
The sponge removes carbon dioxide and other waste products through its pores as the water goes through.
Sponges have a low level of reaction to the world around them. They also do not have a brain.
A sponge reproduces by budding and growing new sponges.
Sponges are made up of collagen which supports the shape of the sponge.