What is the body structure of a sponge?
What is the body structure of a sponge?
The body of a sponge consists of jelly-like material (mesohyl) made mainly of collagen and reinforced by a dense network of fibres also made of collagen. sandwiched between two thin layers of cells. Many also have a skeleton made up of spicules of calcium carbonate or silica.
What is body wall of sycon?
T.S of Sycon: Body wall is diploblastic with an outer dermal layer and inner gastric layer. 2. The gastric layer is made up of mesenchym with interspersed monaxcr and triaxon spicules and is lined internally with flat pinacocyte cells. 3. The dermal layer is also made by flat pinacocytes and is perforated by ostia.
What is the name of the body cavity of a sponge?
spongocoel
A spongocoel (/ˈspɒŋɡoʊˌsiːl/), also called paragaster (or paragastric cavity), is the large, central cavity of sponges.
What is the basic body plan of a sponge?
The most basic body plan is called asconoid. In asconoid sponges the two major cell layers surround a fluid-filled cavity called the spongocoel, the large central cavity of sponges .
What is Ostia sycon?
1) Ostia: The body wall is folded. In between two folds an incurrent canal is present. The opening of incurrent canal shows a pore membrane. This will show one or two ostia, through which water enters into the incurrent canals.
What does spongocoel mean?
: the internal cavity of a sponge discharging by way of the osculum.
Does sponge have body cavity?
Sponges do not have a coelom. A coelom is the cavity within the body in which the intestines, lungs, heart, kidney, etc., are located, and it is sealed off from the outside world. The body cavity of sponges is large, it is open to the outside world, and it enables the sponge to consume food (Dawkins 2004).
What is the order of sycon?
Leucosolenida
Sycon/Order
What makes up the body of a Sycon?
Sycon is in the form of branched cylinders, all these branches are attached to the same base. Even though the body has firm consistency they are slightly flexible. They have minute openings called pores or ostia. At the end of each branch it has an opening called osculum. The wall of the sycon is lined by cells called pinacocytes.
What are the pores and Ostia of a Sycon?
The classification of sycon is given below. Sycon is in the form of branched cylinders, all these branches are attached to the same base. Even though the body has firm consistency they are slightly flexible. They have minute openings called pores or ostia. At the end of each branch it has an opening called osculum.
Where are the prosopyles located in the Sycon?
The wall between the incurrent and radial canals is pierced by numerous minute pores called prosopyles. In Sycon, each prosopyle is an intercellular space or channel while in Leucosolenia these pores are intracellular. Through these pores, the incurrent canals open into the radial canals.
What kind of canal system does a Sycon have?
It penetrates the body with watcher channels. The canal type precisely seen in Sycon is Syncoid Stage I type, more advanced than asconoid canal system. The Ostia opens into a central cavity through a system of canals, the central cavity is known as spongocoel.