What muscles are involved in deglutition?

What muscles are involved in deglutition?

The structures involved in deglutition include the tongue, hard and soft palate, pharyngeal muscles, esophagus, and gastroesophageal junction. Coordination of swallowing is controlled by the trigeminal (CN V), facial (CN VII), glossopharyngeal (CN IX), vagus (X), and hypoglossal (CN XII) nerves and their nuclei.

What mobile organ initiates deglutition?

The reflex is initiated by touch receptors in the pharynx as a bolus of food is pushed to the back of the mouth by the tongue, or by stimulation of the palate (palatal reflex). Swallowing is a complex mechanism using both skeletal muscle (tongue) and smooth muscles of the pharynx and esophagus.

What is the organ of swallowing?

Stop 2: The Pharynx and Esophagus The act of swallowing takes place in the pharynx partly as a reflex and partly under voluntary control. The tongue and soft palate — the soft part of the roof of the mouth — push food into the pharynx, which closes off the trachea. The food then enters the esophagus.

What are the three phases of deglutition quizlet?

Terms in this set (3)

• Buccal Phase. -voluntary. -tongue pushes food to the oropharynx area.
• Pharyngeal phase. -involuntary. -epiglottis closes over the glottis and swallowing begins.
• Esophageal phase. -involuntary. -upper esophageal sphincter opens and the bolus begins moving down esophagus.

What organ secretes enzymes that digest carbohydrate fat and protein?

PANCREAS. The pancreas produces a juice containing several enzymes that break down carbohydrates, fats, and proteins in food. The pancreas delivers digestive juice to the small intestine through small tubes called ducts.

What is the act of deglutition?

The process of swallowing, also known as deglutition, involves the movement of substances from the mouth (oral cavity) to the stomach via the pharynx and esophagus. Swallowing is an essential and complex behavior learned very early in development.

What is the first phase of swallowing?

Swallowing starts with the oral phase. This phase begins when food is placed in the mouth and moistened with saliva. Moistened food is called a food bolus.

How many stages of deglutition are there quizlet?

Three phases of swallowing (deglutition)

Which is part of the body is involved in deglutition?

The structures involved in deglutition include the tongue, hard and soft palate, pharyngeal muscles, esophagus, and gastroesophageal junction.19 Coordination of swallowing is controlled by the trigeminal (CN V), facial (CN VII), glossopharyngeal (CN IX), vagus (X), and hypoglossal (CN XII) nerves and their nuclei.

How is deglutition aided by the pharynx and esophagus?

Although this sounds quick and effortless, deglutition is, in fact, a complex process that involves both the skeletal muscle of the tongue and the muscles of the pharynx and esophagus. It is aided by the presence of mucus and saliva. There are three stages in deglutition: the voluntary phase, the pharyngeal phase,…

What happens to the soft palate during deglutition?

Chapter Review. During deglutition (swallowing), the soft palate rises to close off the nasopharynx, the larynx elevates, and the epiglottis folds over the glottis. The esophagus includes an upper esophageal sphincter made of skeletal muscle, which regulates the movement of food from the pharynx to the esophagus.

Is the oral phase of deglutition under voluntary control?

The oral phase – which includes the gathering of food, movements within the oral cavity, mastication and the formation of boluses of ingesta at the base of the tongue – is under voluntary control.