Operculum: The operculum is the bony flap that protects the gills from harm. It opens and closes to allow water to pass over the gills.
What is the operculum and how does it work?
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.
How does the operculum protect the gills?
All bony fish also have a bony plate called an operculum, which opens and closes to protect the gills. … That means fish need to run a lot of water over their gills to get the amount of oxygen they need to survive. Also, gills are very efficient in extracting the oxygen the fish needs!
Where is the operculum fish?
The operculum is a triangle-shaped bone that is posterior to the eye and mouth and positioned on each of the fish’s lateral sides (Figure 1), joined to the fish via a ball-and- socket hinge.
What are the functions of the different parts of fish?
The dorsal and anal fins primarily help fish to not roll over onto their sides. The caudal fin is the main fin for propulsion to move the fish forward. The paired fins assist with steering, stopping and hovering.
What is a fish operculum made of?
The operculum of a bony fish is the hard bony flap covering and protecting the gills. In most fish, the rear edge of the operculum roughly marks the division between the head and the body. The operculum is composed of four bones; the opercle, preopercle, interopercle, and subopercle.
What is the function of operculum in bryophytes?
…of an apical lid (the operculum). When the operculum falls, there is exposed a ring of teeth that controls the release of the spores over an extended period of time. These teeth usually respond to slight moisture changes and pulsate inward and outward, carrying spores out of the sporangium on… …
What is respiratory system of fish?
Fish gills are organs that allow fish to breathe underwater. Most fish exchange gases like oxygen and carbon dioxide using gills that are protected under gill covers (operculum) on both sides of the pharynx (throat). … The gills push the oxygen-poor water out through openings in the sides of the pharynx.
Why is the operculum near the head of the fish?
The operculum is a hard, plate-like, bony flap that covers the gills of a bony fish (superclass: Osteichthyes). It protects the gills and also serves a role respiration. Fish can acquire dissolved oxygen through pumping water over their gills by opening and closing their jaws and opercula.
How are fish adapted for gas exchange?
Fish use specialised surfaces called gills to carry out gas exchange. Gills are highly folded, giving them a large surface area and maximising the efficiency of gas exchange. The gill filaments have many protrusions called gill lamellae.
What is an operculum biology?
noun, plural o·per·cu·la [oh-pur-kyuh-luh], o·per·cu·lums. Botany, Zoology. a part or organ serving as a lid or cover, as a covering flap on a seed vessel. Zoology. the gill cover of fishes and amphibians.
What type of bone is the operculum?
The operculum is a large flap consisting of several flat bones found on the side of the head of bony fish. During development, the opercular bones form within the second pharyngeal arch, which expands posteriorly and comes to cover the gill-bearing arches.
What animal has an operculum?
An operculum (fish), a flap that covers the gills in bony fishes and chimaeras. The cover that rapidly opens a cnida of a cnidarian such as a jellyfish or a sea anemone.
What are the functions of fins and tail of fish?
Apart from the tail or caudal fin, fish fins have no direct connection with the spine and are supported only by muscles. Their principal function is to help the fish swim. Fins located in different places on the fish serve different purposes such as moving forward, turning, keeping an upright position or stopping.
What is the function of dorsal fin in fish?
The dorsal fins increase the lateral surface of the body during swimming, and thereby provide stability but at the expense of increasing drag (see also BUOYANCY, LOCOMOTION, AND MOVEMENT IN FISHES | Maneuverability).