The simplest and least common sponge body form is asconoid. The other body forms are leuconoid or syconoid. Here, let's discuss more about the asconoid sponges and their canal system.

The asconoid type of canal system is characterised by the presence of a complete continuous layer of choanocytes lining the spongocoel interrupted only by the porocyte (Fig. 11.12). This type of canal system is found in some simple adult calareous sponges (e.g., Leucosolenia, Clathrina).

Asconoid type of canal system is found only in few sponges, e.g., Olynthus, Leucosolenia. According to Hyman, the important features of the asconoid structure are the simple wall and the complete continuous lining epithelium of choanocytes, interrupted only by the inner ends of …

2023年7月31日 · Learn about asconoid sponges, their structure, types, and the unique asconoid type canal system. Understand the role of choanocytes, pinacocytes and the functions of the canal system.

The simplest body structure in sponges is a tube or vase shape known as "asconoid", but this severely limits the size of the animal. The body structure is characterized by a stalk-like spongocoel surrounded by a single layer of choanocytes.

2024年3月20日 · There are three main types of canal systems in sponges: asconoid, syconoid, and leuconoid. Asconoid sponges have the simplest canal system, while leuconoid sponges have the most complex.

Most sponges have one of three types of canal systems: asconoid, syconoid, or leuconoid (Figure 12-5).

2023年2月6日 · Sponges can be classified into two main types based on the structure of their canal system: Asconoid, Syconoid, and Leuconoid. The simplest of the three canal systems is this one. It can be found in asconoid sponges like Leucosolenia and some of the second sponges’ developmental phases.

This type of canal system is the characteristic of syconoid sponges like Scypha. Theoretically this canal system can be derived from asconoid type by horizontal folding of its walls. Also embryonic development of Scypha clearly shows the asconoid pattern being converted into syconoid pattern.

Incurrent pores or ostia are the openings through which water first enters a sponge. These are usually formed by several cells. The PROSOPYLE is the name given to the entry hole/channel/pore leading into the area of choanocytes. It is …