What is the excretory product of cartilaginous fishes?

What is the excretory product of cartilaginous fishes?

Most nitrogenous waste in marine fishes appears to be secreted by the gills as ammonia. Marine fishes can excrete salt by clusters of special cells (chloride cells) in the gills.

How the excretory system works for a fish?

Excretory system As with many aquatic animals, most fishes release their nitrogenous wastes as ammonia. Some of the wastes diffuse through the gills into the surrounding water. Others are removed by the kidneys, excretory organs that filter wastes from the blood.

What is the excretory product in fish?

Ammonia is the excretory waste in fishes.

What is the excretory product of chondrichthyes?

Excretion of Chondrichthyes Cartilaginous fishes excrete urea (a chemical found in urine) as nitrogen waste (they are ureotelic, like adult amphibians and mammals).

Why cartilaginous fishes excrete urea?

Ureotelic : Ureotelic organisms are the organisms which excretes urea as their waste. These animals require less water for the excretory purposes as urea is less toxic than that of the ammonia. The ureotelic organisms include bony fishes, adult amphibians, cartilaginous fishes and mammals including humans.

Does the excretory system?

The Excretory system is responsible for the elimination of wastes produced by homeostasis. There are several parts of the body that are involved in this process, such as sweat glands, the liver, the lungs and the kidney system. Every human has two kidneys.

What is the main function of the excretory system?

The function of the excretory system to remove wastes from the body. These wastes include water, CO2, nitrogen, salts, and heat. Metabolism: The process of the body coverting food into energy. As a result of metabolism, there are waste products.

What systems work with the excretory system?

The excretory system is a close partner with both the circulatory and endocrine system. The circulatory system connection is obvious. Blood that circulates through the body passes through one of the two kidneys. Urea, uric acid, and water are removed from the blood and most of the water is put back into the system.

How do aquatic animals like fishes excrete their waste?

Aquatic animals will excrete waste products in the form of ammonia gas which dissolves in water and these organisms are known as ammonotelic animals.

What is excretory material of marine bony fish?

So, excretory product of marine bony fishes is urea.

How do fish excrete urea?

Freshwater fish mostly excrete ammonia with only a small quantity of urea. A closely related species that lives in water at pH 7.1 lacks these enzymes and excretes mainly ammonia with small amounts of urea produced via uricolysis. It dies within 60 min when placed in water from Lake Magadi.

Which type of fishes excrete ammonia?

Many ammonotelic fishes, which excrete more than 50% of the nitrogenous waste as ammonia, are carnivorous and sustain high rates of hepatic amino acid catabolism (Bever et al., 1981).

What is the primary excretory organ in fish?

The primary excretory organ in fishes, as in other vertebrates, is the kidney. In fishes some excretion also takes place in the digestive tract, skin, and especially the gills (where ammonia is given off).

What are cartilaginous fishes?

Cartilaginous fishes belong to the Chondrichthyes class that includes the sharks, skates, and rays, and the other course includes chimeras. These are the vertebrates whose internal skeleton is made of cartilage, and these species contain no bones.

What is the anatomy of a bony fish?

The bony fish is the largest group of vertebrates that are existing today. The head and the pectoral girdles are covered with bones that are derived from the skin. The swimming bladder helps the bony fishes to balance their body between sinking and floating.

What is the difference between the kidneys of freshwater and marine fish?

The kidney of freshwater fishes is often larger in relation to body weight than that of marine fishes. In both groups the kidney excretes wastes from the body, but the kidney of freshwater fishes also excretes large amounts of water, counteracting the water absorbed through the skin.