Internally, there are no brains, stomachs or other organs. This is because the sponge evolved much faster than other animals. In fact, sponges don't even have true tissue. Instead, their bodies are made up of specialized cells (tissues at the cellular level) that do specific tasks. March. 2019г. The sponge has no chlorophyll and you cannot make your own food. They capture different organisms for nutrition. Most sexually reproducing sponges produce sperm and eggs. Therefore, it is considered an animal rather than a plant and helps digest food and remove waste products through oscrams. Sponges have special cells that have the ability to transform into other cell types. Therefore, the sponge is made of these special cells and has no head, trunk, body organs, or appendages. They are simple multicellular organisms.
However, unlike higher metazoans, the cells that make up the sponge are not organized into tissues. Therefore, the sponge lacks true tissue and organs. Moreover, they have no body symmetry. However, the sponge has special cells that perform certain functions. Click to see the full answer.
Do sponges have tissues or organs?
Because it is so simple, it has no tissues or organs, but it has special cells that perform certain functions such as protection, generation of water flow, and decomposition of pathogens. Sponges are one of the first animals to evolve and are believed to belong to the phylum of animals known as Porifera.
Why are sponges considered animals?
Why are sponges considered animals? The sponge is an animal, not a plant, because it is classified as a phylum of the animal kingdom. Sponges are horozoic in nature, so they can catch and eat food. There is no cell wall and its life cycle includes the larval stage.
Why does the sponge have no head?
They help digest food and remove waste products through oscrams. Sponges have special cells that have the ability to transform into other cell types. Therefore, the sponge is made of these special cells and has no head, trunk, body organs, or appendages.
How do sponges propagate?
Sponges also breed using their pumping. That is, pump sperms and eggs into the water. They were the first animals to reproduce sexually. The sponge has no tissues or organs. The beating choanocytes (special cells with flagella) and the porous structure of the sponge's body pump water throughout the body.
Why are there no organs on the sponge?
Unlike protozoa, sponges are multicellular. However, unlike higher metazoans, the cells that make up the sponge are not organized into tissues. Therefore, the sponge lacks true tissue and organs. Also, there is no body symmetry.
Does the sponge have organs?
The sponge is considered the oldest animal phyla. They are multicellular, but have no tissues or organs. .. The small pores are the entrance to a complex channel system where the sponge pumps a stream of water from which cells extract small particles of food.
How does a sponge live without organs?
Most of them have no symmetry. Some of those cells do a special job, but the sponge lacks tissues and organs. .. It is the key to the survival of the sponge, as moving water carries food and removes waste products. Water enters the small pores of the sponge's entire body.
Why doesn't the sponge have a complete digestive system?
Due to the lack of a true digestive system, sponges are intracellularly dependent on their choanocyte digestive process for their energy intake. The limitation of this type of digestion is that the food particles must be smaller than the individual cells.
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