Invertebrates, or invertebrates, are animals that do not contain bone structures such as skulls and vertebrae. The simplest of all invertebrates is the sponge, which contains only the sponge phylum (Figure 1).
Does the sponge have a head?
Since the sponge is sessile and does not move, it filters water to feed. .. You might think that the sponge doesn't look like an animal. They have no head or legs. Internally, there are no brains, stomachs or other organs.
Do sponges have a head?
Sponges do not have heads or tails. They are basal metazoans characterized by a lack of true tissue (with a few exceptions), sensu stricto of the muscle or nervous system, gastrointestinal cavities, and gonads.
Can you think of a sponge?
Sponges do not have the nervous system or organs like most animals. This means they do not have the ability to feel the eyes, ears, or anything physically. .. Since the sponge has no nerves or brain, it does not have the ability to cognitively control movement.
What is the structure of the sponge?
The body of the sponge is hollow, a jelly-like substance whose main component is collagen, and is kept in shape by glue reinforced by a dense network of fibers also made of collagen. The inner surface is lined with choanocytes, which are cells with a cylindrical or conical collar that surrounds one flagella for each choanocyte.
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