The operculum is a series of bones found in bony fish and chimaeras that serves as a facial support structure and a protective covering for the gills; it is also used for respiration and feeding.

What is the function of operculum?

The operculum is a series of bones found in bony fish and chimaeras that serves as a facial support structure and a protective covering for the gills; it is also used for respiration and feeding.

Is operculum an organ?

The gills, located under the operculum, are a respiratory organ for the extraction of oxygen from water and for the excretion of carbon dioxide. They are not usually visible, but can be seen in some species, such as the frilled shark.

What is Opercular cavity?

Definition: Anatomical space which is located beneath the operculum and external to the gills.

What is operculum made of?

The most common kind of operculum is composed of a thin to rather thick corneous protein material, which is yellow to brownish in color and is usually somewhat translucent. This matter is supple when in its natural state but may become brittle when it is dried out.

Where is the operculum located?

A part of the parietal lobe, the frontoparietal operculum, covers the upper part of the insular lobe from the front to the back. The opercula lie on the precentral and postcentral gyri (on either side of the central sulcus).

Is operculum present in Chondrichthyes?

The operculum is composed of corneous protein material, which is yellow to brownish in colour. Complete answer: Scoliodon, chimaera, torpedo, trygon fall under the class Chondrichthyes and subclass Pisces.

What is the opercular valve?

Operculum – bony gill covering in teleosts that protects the gill filaments. Pseudobranch – gill bar with posterior filaments modified to serve a nonrespiratory function, such as sensory or salt balance.

Did gills evolve from lungs?

Gills were present in the earliest fish, but lungs also evolved pretty early on, potentially from the tissue sac that surrounds the gills.

How do you identify an operculum?

When you find an operculum on the beach, it will most likely be dry and grey or brown in appearance. The aperture, or the opening of the shell, is different in each species and therefore opercula come in many different shapes. However, they are generally circular or oval.

Where is the operculum?

The operculum is the cortical structure which forms the lid over the insular cortex, overlapping it and covering it from external view. More specifically it consists of the cortical areas adjacent to the insular lobe and its surrounding circular sulcus.