Which is the simplest canal system?

Which is the simplest canal system?

Asconoid canal system
A) Asconoid canal system: This is the simplest form of canal system present in Leucosolenia – like asconoid sponges. This is the only canal structure in which choanocytes are coated with spongocoel. Cells called podocytes are expressed by the ostia. Within them, these cells have an intracellular canal.

What is the simplest sponge canal type?

Asconoid Type
Asconoid Type: The asconoid type of canal system is regarded to be the most simple and primitive grade of canal system. Asconoid type is present in these sponges whose body is vase-like and radially symmetrical.

Which is the simplest and least common form of canal system present in sponges?

So, the correct answer is ‘Asconoid’.

What is a canal system is found in porifera?

CANAL SYSTEM IN PHYLUM PORIFERA (SPONGES) All the cavities of the body traversed by the currents of water, which nourish the sponge from the time it enters by the pores until it passes out by the osculum, are collectively termed canal system. In the Olynthus canal system is seen in its simplest type.

Where are choanocytes located?

Location. Choanocytes are found dotting the surface of the spongocoel in asconoid sponges and the radial canals in syconoid sponges, but they comprise entirely the chambers in leuconoid sponges.

What is water canal system?

The water canal system is a peculiar feature of sponges. The body wall bears many minute pores called ostia. On the anterior side of the body, there is a large single opening called the osculum. Water enters the spongocoel through ostia and leaves the body through the osculum.

What are Incurrent pores?

Incurrent pores or ostia are the openings through which water first enters a sponge. These can be formed by one or more cells. The PROSPYLE is name given to the entry hole/channel/pore leading into the area of choanocytes. It is formed by one donut-shaped cell, the porocyte.

What is Apopyle?

: one of the openings by which the water passes out of a radial canal or flagellated chamber of a sponge.

Which is the simplest canal system in Porifera?

The simplest type of canal system in Porifera is radial type. Sponges belong to the phylum porifera. Ostia, spongocoel and osculum together form a canal system which is characteristic of all sponges. Canal system of Leucosolenia is of ascon type.

What kind of canal system does a sponge have?

This canal system is the characteristic of the leuconoid type of sponges like Spongilla. In this type the radial symmetry is lost due to the complexity of the canal system and this result in an irregular symmetry. The flagellated chambers are small compared to that of the asconoid and syconoid type.

Which is the characteristic feature of the phylum Porifera?

The water circulatory system of sponges also called as canal system is the characteristic feature of the phylum Porifera. Canal system is also known as aquiferous system.

What kind of canal system does Grantia have?

It opens to the exterior though an excurrent opening called osculum which is similar to that of the ascon type of canal system. Sycon canal system takes a more complex form in few species like Grantia, where the incurrent canals are irregular and branching forming large sub-dermal spaces.