Sponges are the simplest multicellular animals. They lack a real organization. There are no muscles, nerves or internal organs. 2. Sponges live all over the world Sponges are animals, not plants, because they are classified in the phylum of the animal kingdom. Sponges are horozoic in nature and are cell-free because they capture and eat food. Walls, their life cycle includes larval stage. In addition, they are called animals because they are ectodermal and have glycogen as a preserved food material. The sponge is the only multicellular animal without a nervous system. There are no nerve cells or sensory cells. Do all animals have the same nervous system? With the exception of sponges, all animals have a true nervous system. Special cells in the sponge include cells that filter seawater. Phagocytic cells (cells that swallow and digest food particles); those that form the external "skin", breathing holes, and tubes through which water enters and exits the body.
Do sponges have tissues or organs?
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 sponges animals, not plants?
Sponges are animals, not plants, because they are classified in the phylum of the animal kingdom. Sponges are horozoic in nature, capture and eat food, have no cell walls, and have a life cycle that includes the larval stage. .. In addition, they are called animals because they are ectodermal and have glycogen as a preserved food material.
Do sponges have nerve cells?
The lifestyle they lead, sea sponges do not require nerve cells, and therefore the missing sponges have a clear circulatory, respiratory, digestive, and excretory system. Is not What they do is have a water flow system to support all these features.
What is the function of the sponge cell?
Sponge cells perform all the functions of organs in higher animals and communicate with each other, a shared ability of all animal cells. Sponges are the only animals that can reconstruct themselves when broken down to the cellular level. Dr.
How does a sponge survive without organs?
Sponge Filtration Sponge does not have true sensory organs, so it cannot hunt prey. Fortunately, they don't have to travel to find food. .. These cells are equipped with small tentacles called flagellas that sway back and forth to draw water into the body of the sponge.
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.
Does the sponge need a body system?
Since the sponge has no organ system, it has no respiratory or circulatory system. They acquire oxygen by diffusing from the water flowing through their bodies, and waste is expelled by diffusing into the same puddle.
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