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gastrodermis是什么意思，gastrodermis翻译
Gastrodermis: The Innerlayer of Cnidarian Gastrodermis
The gastrodermis is the innermost layer of the gastrodermis, a type of tissue found in cnidarians. Cnidarians are a diverse group of animals that includes jellyfish, corals, and sea anemones. They are characterized by their radial symmetry and specialized stinging cells called cnidocytes. The gastrodermis plays a crucial role in the digestion and absorption of nutrients in these animals.
The gastrodermis is responsible for the secretion of digestive enzymes and the absorption of nutrients from the food that is captured by the cnidarian. In some species of cnidarians, the gastrodermis also plays a role in the protection of the animal. For example, in sea anemones, the gastrodermis secretes a tough, protective layer called mesoglea that covers the outer surface of the animal.
The cells of the gastrodermis are typically columnar in shape and have flagella that help to move food particles through the digestive system. The cells also have specialized structures called microvilli that increase the surface area of the cell, allowing for more efficient absorption of nutrients. The microvilli are covered in a layer of mucous that helps to protect the cells from the digestive enzymes that are secreted by the gastrodermis.
In some species of cnidarians, the gastrodermis is also involved in the production of sperm and eggs. The cells of the gastrodermis undergo meiosis to produce haploid cells, which are then released into the water column where they can be fertilized by sperm from another individual. The fertilized eggs develop into planula, the larval stage of the cnidarian, which eventually settle on a surface and begin to develop into an adult.
The gastrodermis is a complex and versatile tissue that plays a crucial role in the survival and reproduction of cnidarians. Its unique structure and functions allow it to carry out the digestive, absorptive, and protective functions that are essential for the health and well