The involuntary movement of the bolus through the digestive system is known as?
At the end of the oral preparatory phase, the food bolus has been formed and is ready to be propelled posteriorly into the pharynx. In order for anterior to posterior transit of the bolus to occur, orbicularis oris contracts and adducts the lips to form a tight seal of the oral cavity. Next, the superior longitudinal muscle elevates the apex of the tongue to make contact with the hard palate and the bolus is propelled to the posterior portion of the oral cavity. Once the bolus reaches the palatoglossal arch of the oropharynx, the pharyngeal phase, which is reflex and involuntary, then begins. Receptors initiating this reflex are proprioceptive (afferent limb of reflex is IX and efferent limb is the pharyngeal plexus- IX and X). They are scattered over the base of the tongue, the palatoglossal and palatopharyngeal arches, the tonsillar fossa, uvula and posterior pharyngeal wall. Stimuli from the receptors of this phase then provoke the pharyngeal phase. In fact, it has been shown that the swallowing reflex can be initiated entirely by peripheral stimulation of the internal branch of the superior laryngeal nerve. This phase is "voluntary" and involves important cranial nerves: V (trigeminal), VII (facial) and XII (hypoglossal).
The involuntary movement of the bolus through the oropharynx in the digestive system is known as?
the pharyngeal phase pharyngeal phase
Swallowing
No context provided
The involuntary movement of the bolus through the esophagus in the digestive system is known as?
Esophageal peristalsis
Bolus (digestion)
https://en.wikipedia.org/wiki/Bolus%20%28digestion%29
Swallowing
https://en.wikipedia.org/wiki/Swallowing
In digestion, a bolus (from Latin bolus, "ball") is a ball-like mixture of food and saliva that forms in the mouth during the process of chewing (which is largely an adaptation for plant-eating mammals).
Bolus (digestion)
The upper esophageal sphincter relaxes to let food pass, after which various striated constrictor muscles of the pharynx as well as peristalsis and relaxation of the lower esophageal sphincter sequentially push the bolus of food through the esophagus into the stomach.
Swallowing
In digestion, a bolus is a ball-like mixture of food and saliva that forms in the mouth during the process of chewing. Once the bolus reaches the palatoglossal arch of the oropharynx the pharyngeal phase, which is reflex and involuntary movement, begins. The involuntary movement of Esophageal peristalsis moves the bolus along the esophagus into the stomach.