Sponge Anatomy
Instead they consist of three cell sized layers. The cells in the outer layers can move inward and change function.
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Wall of a sponge contains amoebocytes they are creeping mobile cells with a variety of functions including digestion and ability to differntiate into other cell types as needed.
Sponge anatomy. They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them consisting of jelly like mesohyl sandwiched between two thin layers of cells. The branch of zoology that studies sponges is known as spongiology. Porifera is a phylum comprising of the multi cellular invertebrate animals called sponges.
Simple sponges with choanocytes lining inner cavity radially symmetrical syconoid condition choanoderm and pinacoderm folding creates the shape. These formations are made of a sponge like tissue containing trabeculae irregular blood filled spaces lined by endothelium and separated by connective tissue septa. In the gel layer are either spicules supportive needles made of calcium carbonate or spongin fibers a flexible skeletal material made from protein.
Sponges obtain nourishment and oxygen from this flowing water. Simple worksheet for labeling the parts of the sponge such as the osculum and choanocyte. The body of a sponge has two outer layers separated by an acellular having no cells gel layer called the mesohyl also called the mesenchyme.
A trivia quiz called sponge anatomy. Compressed polygonal cells called pinacocytes make up the pinacoderm the external sac layer. Choanocytes in small chambers called choanocyte chambers original much that open to an apopyle leading to the spongocoel.
Sponges contain no organs or even tissue. The two corpora cavernosa lie along the penis shaft from the pubic bones to the head of the penis where they join. The flowing water also carries out waste products.
The animals of this phylum have tiny pores in their body walls and this characteristic feature is the basis of the name of this phylum. Cells embedded in the sponge tissue that ppick up nutrients from the incoming water and distribute nutrients throughout the sponge. Test your knowledge about sponge anatomy with this online quiz.
The term porifera literally means pore bearers.
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