Body Parts Of Fish And Their Function

Body Parts Of Fish And Their Function – The internal organs of the fish perform the main functions of the body such as breathing, digestion and sensing. The brain, stomach, liver and kidneys are the same for fish as they are for humans and perform the same function. Some members are different; man has lungs for breathing, while fish have gills for the same purpose. Name and function of internal organs with their functions are given below.

The body of the fish is built on this basic structural framework. This unit is attached to the skull at the front and the tail at the back. Multiple vertebrae that are hollow make up the spine. These vertebrae protect the fragile spinal cord.

Body Parts Of Fish And Their Function

Body Parts Of Fish And Their Function

The lateral line is one of the sensory organs of the fish, which helps the fish to detect the vibrations in the water and format the direction of their source.

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Floating material is a hollow and gas-filled organ. It allows the fish to save energy and provide neutral stability in the water. Fish submerged in water must release air from the swim ladder as they ascend, due to the difference in atmospheric pressure that circulates across the surface of the water. Fish without air bladders sink to the bottom if they stop swimming.

Gills help fish breathe underwater. Gills are fragile organs and should not be touched while the fish is alive.

This organ is present at the junction of stomach and intestine. It has a finger like projection and its function is to secrete enzymes that help in digestion. It also helps in the absorption of digested food.

Gonads are the reproductive organs of fish. In female fish, the bright organ, which contains the collection of eggs, is clearly defined during the spawning period. The male reproductive organ is much smaller and less white in color. It produces milk to fertilize eggs.

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This organ is also used for locomotion. This part is usually eaten by humans because it contains certain vitamin deposits. Muscles make up the bones of the fish. External anatomy of the bony fish (Hector’s lantern): 1. operculum (cap of the gills), 2. lateral line, 3. dorsal finger, 4. fin, 5. caudal base, 6. caudal fin, 7. anal, 8. photophores, 9. pelvic fins (pair), 10. pectoral fins (pair)

Fish anatomy is the study of the shape or morphology of fish. It can be compared to fish physiology, which is the study of how the components of a fish work together in a living fish.

In practice, fish anatomy and fish physiology complement each other, the first can be observed with the structure of the fish, its organs or parts and the way they are put together, for example, on a dissecting table or under a microscope. the latter on how these components work together in living fish.

Body Parts Of Fish And Their Function

The anatomy of a fish is often shaped by the physical characteristics of the water, the habitat of the fish. Water is more disordered than air, holds relatively less dissolved oxygen, and absorbs more light than air. The body of a fish is divided into the head, trunk and tail, although the parts between these three are not always visible from the outside. The skeleton, which forms the supporting structure inside a fish, is made either of cartilage (cartilaginous fish) or bone (bony fish). The main element of the skeleton is the vertebral column, which consists of articulating vertebrae, which are light and strong. The ribs are attached to the spine and there are no limbs or girdle. The main external features of fish, the fins, consist of bony or soft spines called rays, which, with the exception of the caudal fin, are not directly connected to the spine. They are supported by muscles that make up the main part of the body.

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The heart is composed of two chambers and pumps blood through the respiratory surfaces of the gills and around the body in a circulatory loop.

There is an inner ear, but no outer or middle ear. Low-frequency vibrations are detected by the lateral line system of sse organs that run along the sides of the fish, responding to nearby movements and changes in water pressure.

Sharks and rays are basal fishes that share many primitive anatomical features similar to those of ancient moons, including skeletons composed of cartilage. Their bodies are dorso-ventrally smooth, and they usually have five pairs of salivary pores and a large mouth on the side of the head. The dermis is covered with individual placoid scales of the skin. They have a cloaca into which the urinary and urinary passages enter, but no swim bladder. Cartilaginous fish produce small quantities of large yolk eggs. Some species are oviparous, with the young developing internally, but others are oviparous, in which the eggs develop externally.

Bonefish lineages have more derived anatomical features, often with major evolutionary changes from ancient fish features. They have a bony skeleton, are flat laterally, have five pairs of gills protected by an opculum, and the mouth is at or near the tip of the snout. The dermis is covered with overlapping scales. Bony fish have a swim bladder that helps them maintain a constant depth in the water column, but no cloaca. They mainly have a large number of small eggs with little yolk, which they spread in the water column.

External Anatomy Of Fish, Structure & Function Of Fishes

In many ways, the anatomy of fish differs from that of mammals. However, it still has the same basic body plan from which all vertebrates are derived: a notochord, rudimentary vertebrae, and a well-defined head and tail.

Fish have different body plans. At a broad level, their body is divided into a head, trunk and tail, although the parts are not always visible from the outside. The body is often fusiform, an organized body plan often found in fast-moving fish. They can also be filiform or vermiform. Fish are often either compressed (thin laterally) or depressed (smooth dorso-ventrally).

There are two different types of skeletons: the exoskeleton, which is the stable outer shell of the body, and the doskeleton, which forms the supporting structure inside the body. The skeleton of fish consists of cartilage (cartilaginous fish) or bone (bony fish). The vertebrae are made up of bony rays and have no direct connection to the spine other than the vertebrae. They are supported only by muscles. The ribs connect to the spine.

Body Parts Of Fish And Their Function

Bones are hard organs that form part of the skeleton of vertebrates. They function to move, support and protect various body parts, produce red and white blood cells, and store minerals. Bone tissue is a type of connective tissue. Bones come in many shapes and have a complex internal and external structure. They are lightweight, yet strong and tough, in addition to performing many of their other biological functions.

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Fish are vertebrates. All vertebrae are built on the basic chordate body plan: a stiff rod that runs through the vertebral column, or notochord).

With a hollow tube of nervous tissue (spinal cord) above and the gastrointestinal tract below. In all vertebrates, the mouth is at or just below the anterior d of the animal, while the anus is on the outside of the anterior d of the body. The rest of the body outside the anus forms a tail with vertebrae and a spinal cord, but no gut.

The defining feature of a vertebrate is the vertebral column, which consists of a notochord (a rigid rod of the same composition) found in all chordates, with a series of segments of stiffer elements (vertebrae) connected by movable joints (discs between the vertebrae, which embryonically came into being) separated, replaced. and evolutionary from notochord). However, a few fish have secondaries

The vertebral column consists of the ctrum (cranial body or vertebral column), the vertebral arches that extend from the top and bottom of the spine, and various processes that extend from the ctrum or arches. The arch that projects over the ctrum is called the neural arch, while the haemal or chevron arch is located below the caudal vertebrae of the fish. The ctrum of the fish is usually concave in each d (amphycoel), which restricts the movement of the fish. In contrast, the mammalian ctrum is flat at each d (acoelous), a shape that can support and distribute compressive forces.

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The vertebrae of lobe-finned fishes consist of three distinct bony elements. The vertebral arch surrounds the spinal cord and is similar in shape to that found in most other vertebrae. Just lateral to the arch is a small plate-like pleuroctrum that protects the upper surface of the notochord. Beneath it, a larger arched intercutrum protects the lower border. Both of these structures are embedded in a single cylindrical mass of cartilage. A similar arrangement appeared in primitive tetrapods, but in the evolutionary line that led to reptiles, mammals, and birds, the interctrum was partially or completely replaced by a large pleuroctrum.

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