Does digestion occur in the spongocoel?
The sponges draw water carrying food particles into the spongocoel using the beating of flagella in the choanocytes. The food particles are caught by the collar of the choanocyte and brought into the cell by phagocytosis. Digestion of the food particle takes place inside the cell.
What do spongocoel do in sponges?
Water is pumped directly through pores, called ostia, into the spongocoel and then out of the sponge through an opening called the osculum (plural oscula). The spongocoel is lined with specialized digestive cells called choanocytes that filter and take in food.
Where does digestion in a sponge take place?
Digestion in sponges occurs in individual cells. The cells envelop and break down food particles. The tissues, organs and organ systems are absent in sponges. So, they lack digestive systems like other complex animals.
What is a spongocoel Is it a true digestive system?
They do not have a digestive system nor do they release digestive enzymes in the spongocoel to cause extracellular break down of nutrients.
Where does digestion take place in cnidarians?
Cnidarians perform extracellular digestion, with digestion completed by intracellular digestive processes. Food is taken into the gastrovascular cavity, enzymes are secreted into the cavity, and the cells lining the cavity absorb the nutrient products of the extracellular digestive process.
Which type of cells in sponges digest and distribute food?
Amoebocytes are the food distribution system of sponges. The sponge body is composed of two layers of cells.
What is the use of spongocoel?
The spongocoel is lined by a variety of cell types, each having a unique function: porocytes – line the pores of the sponge and are the structure through which water is taken into the organism. choanocytes – exhibit flagella that create inward currents of water for the sponge’s stationary filter feeding mechanism.
What is spongocoel in Porifera?
Spongocoel is a large central cavity in the sponges. Water enters through the numerous ostium in the cavity and exit by a central pore known as osculum. Choanocytes are the flagellated cells which line the spongocoel. It helps to set up water current and helps in intake of food.
How do sponges feed and digest?
Sponges lack complex digestive, respiratory, circulatory, and nervous systems. Their food is trapped as water passes through the ostia and out through the osculum. Bacteria smaller than 0.5 microns in size are trapped by choanocytes, which are the principal cells engaged in feeding, and are ingested by phagocytosis.
What type of digestive system do sponges have?
intracellular digestive processes
Lacking a true digestive system, sponges depend on the intracellular digestive processes of their choanocytes for their energy intake. The limit of this type of digestion is that food particles must be smaller than individual cells.
How do sponges digest their food?
Sponges feed by straining food particles from water. As water enters a sponge, Page 2 it carries tiny organisms such as bacteria and protists. Collar cells on the inside of the central cavity trap these food particles and digest them. Sponges are very efficient at removing food particles from water.
Where are archaeocytes found?
sponges
Archaeocytes or amoebocytes are found in sponges.