What is a pyloric ceca?

In protacanthopterygian: Digestive system. These appendages, called pyloric ceca, secrete enzymes and provide additional digestive areas to the intestine. Among closely related species of the family Salmonidae, there is a tendency for the more predacious species to have more numerous pyloric ceca.

1. Where is the pyloric CECA?
2. What is the benefit of the pyloric caeca adding surface area to the digestive system?
3. Do fish have pyloric caeca?
4. Do tilapia have pyloric caeca?
5. What does a fish's pyloric caeca do?
6. What is the difference between a gizzard and a pyloric caeca?
7. What does the caeca do in birds?
8. How do fish digest food without a stomach?
9. Where is Proventriculus located?
10. What is the function of the caeca in a chicken?
11. What is the name of the white matter responsible for the locomotion of the fish?
12. Why do sharks have a spiral valve?
13. What is a pharynx in fish?
14. What are fish gonads?
15. What does the spleen do in fish?
16. What do kidneys do in fish?
17. What is the difference between Hepatopancreas and liver?
18. Which fish have a gizzard?
19. What fish has a gizzard?

Where is the pyloric CECA?

At the hind end of the stomach – before or just at the beginning of the intestines – many fish have some thin, blind tubes called Pyloric Caeca.

What is the benefit of the pyloric caeca adding surface area to the digestive system?

The pyloric caeca increase the overall intestinal absorptive surface area, and thus the absorption efficiency of nutrients of the gastrointestinal tract.

Do fish have pyloric caeca?

Around the pylorus, many fish have out-pocketings called pyloric caeca. The role of pyloric caeca in digestion has been widely speculated upon. Histologically, they are very similar to the intestine. Around the pyloric caeca (or in that same area in fish lacking them) is pancreatic tissue.

Do tilapia have pyloric caeca?

Second, the differences among the three species lacking ceca are mainly due to differences in intestinal length (tilapia > common carp - grass carp > catfish, gut length/fork length 5.0 > 2.0 = 1.9 > 1.5).

What does a fish's pyloric caeca do?

The function of the pyloric caeca of fish has been uncertain since their detailed description in 345 B.C. by Aristotle. He suggested three hypotheses about their function: "to store up the food," "putrify it up," and "concoct it" (i.e., storage, fermentation, and digestion).

What is the difference between a gizzard and a pyloric caeca?

Anatomical and histological study showed stomach is U-shaped and gizzard like; it is divided into anterior cardiac and posterior pyloric portions, while pyloric caeca is a finger-like straight organ.

What does the caeca do in birds?

The main function of the caeca is the microbial fermentation of vegetable based materials, that the bird was unable to enzymatically digest. Caeca are found almost exclusively in herbivores and omnivores. The caeca has two other functions, water retention and Immunosurveillance.

How do fish digest food without a stomach?

The intestine has its own protein-busting enzymes. The throats of some fish have an extra set of teeth that help to break down what they swallow. “You can have a shift of function to other areas of the gut,” says Wilson. “Every which way you turn, there are species that do perfectly fine without a stomach.

Where is Proventriculus located?

The proventriculus is a standard part of avian anatomy, and is a rod shaped organ, located between the esophagus and the gizzard of most birds. It is generally a glandular part of the stomach that may store and/or commence digestion of food before it progresses to the gizzard.

What is the function of the caeca in a chicken?

The caeca are a pair of tubes that allow fermentation of undigested food to take place. They are emptied every 24 hours or so, and we can see this as a light brown (mustard colour) dropping that is often covered with froth.

What is the name of the white matter responsible for the locomotion of the fish?

Males produce sperm, usually as a milky white substance called milt, in two (sometimes one) testes within the body cavity. In bony fishes a sperm duct leads from each testis to a urogenital opening behind the vent or anus.

Why do sharks have a spiral valve?

The intestines of a shark are much shorter than those of mammals. Sharks have compensated for this problem by having a spiral valve, or a scroll valve, inside the intestine to increase the absorbent surface of the intestine. ... Sharks also possess a rectal gland that removes excess salt.

What is a pharynx in fish?

Fish lack salivary glands. The oral cavity continues into the pharynx, which has both digestive and respiratory functions (see Fig. ... The pharynx has five pairs of lateral gill slits separated by their corresponding branchial arches (see Fig 2 – Musculoskeletal), which open into the opercular chamber.

What are fish gonads?

Male fishes usually have paired testes that produce sperm. Females usually have paired ovaries that produce eggs. ... The two long pale organs are the testes, the male gonads. The deep red strips of tissue either side of the backbone are the kidneys.

What does the spleen do in fish?

The spleen is found in nearly all vertebrates. It is a non-vital organ, similar in structure to a large lymph node. It acts primarily as a blood filter, and plays important roles in regards to red blood cells and the immune system.

What do kidneys do in fish?

The kidneys are one of the body organs involved in excretion and regulation of the water balance within the fish. The kidneys are paired organs located in the body cavity either side of the backbone. Seawater contains more dissolved salts than the body a fish (and freshwater contains less).

What is the difference between Hepatopancreas and liver?

is that liver is (anatomy) a large organ in the body that stores and metabolizes nutrients, destroys toxins and produces bile it is responsible for thousands of biochemical reactions or liver can be someone who lives (usually in a specified way) while hepatopancreas is an organ of the digestive tract of arthropods and ...

Which fish have a gizzard?

Fish. The mullet (Mugilidae) found in estuarine waters worldwide, and the gizzard or mud shad, found in freshwater lakes and streams from New York to Mexico, have gizzards.

What fish has a gizzard?

The mullet is considered a vegetarian and is the only fish that has a gizzard, much like a chicken, that is used to grind up and digest plant material.