zooid , także: zoon

Each type of zooid does not have some structure and functions.

A zooid is a term for a small individual animal, part of a marine colony.

However, they do have a simple nervous system, and muscles, which together can quickly take the zooid down into its shelter.

This occurs by budding off new zooids from the first zooid.

Sexual reproduction starts within a zooid with an internally fertilised egg.

Each opening is the home of zooid.

All the zooids of a colony are asexually produced from one parent zooid.

These spines make it difficult for the nudibranchs to access the polypide of the zooid.

Each type of zooid is not self-sufficient.

When conditions improve, the valves of the shell separate and the cells inside develop into a zooid that tries to form a new colony.

It everts its pharynx into a zooid and sucks out the interior tissues.

He's with his band Zooid.

It has a complex life cycle and exists in several forms of which the gonozooid, or mature zooid with gonads, is the most often seen.

Each subsequent zooid is housed within a tubular or cup-like structure (called a theca).

A colony is founded by a larva which settles and metamorphoses into a zooid, the ancestrula.

However, bryozoan colonies are founded by an ancestrula, which is round rather than shaped like a normal zooid of that species.

Reproduction or growth of the colony can also take place by budding in a radial pattern from the first established zooid, the ancestrula.

The polypide in bryozoans encompasses most of the organs and tissues of each individual zooid.

A zooid where the operculum is modified into a very long, hair-like structure is called a vibraculum.

Each zooid is roughly rectangular, with 4-5 short spines at the distal end and 13-14 tentacles around the lophophore.

Like in other gymnolaematans, their lophophore is protruded by muscles that pull on the frontal wall of the zooid.

The outer surface of the zooid is known as a tunic and is gelatinous and translucent.

Each zooid is an individual, but their integration with each other is so strong that the colony attains the character of one large organism.

Each colony is entirely formed by the asexual reproduction of this founding zooid and subsequent clonal budding.

There are a pair of luminescent organs on either side of the inlet siphon of each zooid.