What is the function of the stomach in a fish?

What is the function of the stomach in a fish?

Fish ingest food through the mouth and break it down in the esophagus. In the stomach, food is further digested and, in many fish, processed in finger-shaped pouches called pyloric caeca, which secrete digestive enzymes and absorb nutrients.

What is in the stomach of a fish?

The stomach varies greatly in fishes, depending upon the diet. In most predacious fishes it is a simple straight or curved tube or pouch with a muscular wall and a glandular lining. Food is largely digested there and leaves the stomach in liquid form.

What is the organ function of the stomach?

Stomach. The stomach is a hollow organ, or “container,” that holds food while it is being mixed with stomach enzymes. These enzymes continue the process of breaking down food into a usable form. Cells in the lining of your stomach secrete a strong acid and powerful enzymes that are responsible for the breakdown process …

What are the functions of different external body parts of fish?

All fish have external appendages called fins. Like human limbs, fins provide fish with the ability to balance, steer, propel, and protect itself. Fins are either single, along the centerline of the fish such as the dorsal fin, anal fin, and tail fin; or paired, like the pectoral fins and pelvic fins.

How does digestion work in carnivorous fishes?

In carnivorous fish, the stomach is muscular and elastic for holding large prey items, while in omnivorous and planktivorous fishes the stomach, if present at all, is small because a more or less constant stream of small food particles can flow directly into the intestine.

How does a fish excrete?

Marine fishes must conserve water, and therefore their kidneys excrete little water. 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 does the fish circulatory system work?

Fish have a closed circulatory system with a heart that pumps blood around the body in a single loop-from the heart to the gills, from the gills to the rest of the body, and then back to the heart. The fishes heart consist of four parts: the sinus venosus, atrium, ventricle, and the bulbus arteriosus.

What are the regions of the stomach?

The human stomach is subdivided into four regions: the fundus, an expanded area curving up above the cardiac opening (the opening from the stomach into the esophagus); the body, or intermediate region, the central and largest portion; the antrum, the lowermost, somewhat funnel-shaped portion of the stomach; and the …

What is the function of stomach and intestine in food digestion?

Stop 3: The Stomach and Small Intestine In addition to holding food, it serves as the mixer and grinder of food. The stomach secretes acid and powerful enzymes that continue the process of breaking the food down and changing it to a consistency of liquid or paste. From there, food moves to the small intestine.

What are the body parts of a fish?

Fish Body Parts List

• Caudal fin.
• Anal fin.
• Pelvic fin.
• Pectoral fin.
• Gill.
• Gill cover.
• Mouth.
• Eye.

What is the function of lateral line in fish?

The lateral line is a sensory system that allows fishes to detect weak water motions and pressure gradients.

Most fishes have only short gill rakers that help keep food particles from escaping out the mouth cavity into the gill chamber. Once reaching the throat, food enters a short, often greatly distensible esophagus, a simple tube with a muscular wall leading into a stomach. The stomach varies greatly in fishes, depending upon the diet.

What is the function of the esophagus in fish?

Once reaching the throat, food enters a short, often greatly distensible esophagus, a simple tube with a muscular wall leading into a stomach. The stomach varies greatly in fishes, depending upon the diet. In most predacious fishes it is a simple straight or curved tube or pouch with a muscular wall and a glandular lining.

What is the digestive system like in a dogfish?

Like the dogfish, the main digestive tract is in the pleuroperitonealcavity. The greater omentumextends from the dorsal wall to thestomach and the gastrosplenicligamentgoes fromthe stomach to the spleen. The dorsal mesentery holds the intestines to thedorsal wall; it is called the mesocolon at the large intestine.

Where is food digested in the human body?

Food is largely digested there and leaves the stomach in liquid form. Between the stomach and the intestine, ducts enter the digestive tube from the liver and pancreas. The liver is a large, clearly defined organ.