Search results
Results from the WOW.Com Content Network
This sinus is a common place for food particles to become trapped; if foreign material becomes lodged in the piriform fossa of an infant, it may be retrieved nonsurgically. If the area is injured (e.g., by a fish bone), it can give the sensation of food stuck in the subject's throat. [2]
While swallowed coins typically traverse the alimentary tract without further incident, care must be taken to monitor patients, as reaction of the metals in the coin with gastric acid and other digestive juices may produce various toxic compounds if the coin remains within the alimentary tract for a prolonged period of time.
Fish bone is any bony tissue in a fish, although in common usage the term refers specifically to delicate parts of the non-vertebral skeleton of such as ribs, fin spines and intramuscular bones. Not all fish have fish bones in this sense; for instance, eels and anglerfish do not possess bones other than the cranium and the vertebrae.
When a swallow is initiated the larynx rises up to two inches, going further away from the esophagus, thereby acting as an additional cover for the airway. During the air pulse administration part of the test it is determined if the reflex (LAR) that initiates the swallow is being responsive enough.
Some fish like carp and zebrafish have pharyngeal teeth only. [30] [31] Sea horses, pipefish, and adult sturgeon have no teeth of any type. In fish, Hox gene expression regulates mechanisms for tooth initiation. [32] [33] While both sharks and bony fish continuously produce new teeth throughout their lives, they do so via different mechanism.
Fish anatomy is the study of the form or morphology of fish. It can be contrasted with fish physiology , which is the study of how the component parts of fish function together in the living fish. [ 1 ]
Most fish species with pharyngeal teeth do not have extendable pharyngeal jaws. A particularly notable exception is the highly mobile pharyngeal jaw of the moray eels.These are possibly a response to their inability to swallow as other fishes do by creating a negative pressure in the mouth, perhaps induced by their restricted environmental niche (burrows) or in the air in the intertidal zone. [10]
Biomechanically this is a unique and extreme feeding method, for which the animal at first must accelerate to gain enough momentum to fold its elastic throat (buccal cavity) around the volume of water to be swallowed. [25] Subsequently, the water flows back through the baleen, keeping back the food particles.