What are muscles of pharynx?
As mentioned earlier, the pharynx consists of 6 major muscles: the superior pharyngeal constrictor, middle pharyngeal constrictor, inferior pharyngeal constrictor stylopharyngeus, salpingopharyngeus, and palatopharyngeus.
What are the 7 openings of pharynx?
Seven cavities communicate with it, viz., the two nasal cavities, the two tympanic cavities, the mouth, the larynx, and the esophagus. The cavity of the pharynx may be subdivided from above downward into three parts: nasal, oral, and laryngeal (Fig.
What type of tissue is found in the pharynx?
The pharynx is composed of mucous membrane, submucosal connective tissue, glands, lymphoid tissue, muscle and an outermost adventitial coating. The mucous membrane does not possess a muscular layer.
What are the longitudinal muscles of the pharynx?
The inner longitudinal layer consists of the palatopharyngeus, salpingopharyngeus, and stylopharyngeus muscles. The pharyngeal muscles receive innervation from the vagus and glossopharyngeal nerve to work in sync to propel food from the oral cavity into the esophagus.
What are the intrinsic muscles of the pharynx?
Muscles of pharynx can be broadly viewed as intrinsic and extrinsic; the former constitutes the superior, middle, and inferior pharyngeal constrictors along with thyropharyngeus (oblique) and cricopharyngeus (horizontal fibers).
How many openings do the pharynx have?
The opening of the mouth into the pharynx is the oropharynx, and the nasal opening is the nasopharynx. The eustachian tube from the middle ear (see Chapter 10, p.
What does the nasopharynx consist of?
Its contents include squamous mucosa, lymphoid tissue (adenoids), pharyngeal constrictor muscles, the levator palatini muscle, and the torus tubarius (the projecting posterior lip of the pharyngeal opening of the eustachian tube).
What structures are in the nasopharynx?
The nasopharynx connects the nasal cavity to the oropharynx and contains the Eustachian tube openings and adenoids. Notable clinical situations include nasopharyngeal carcinoma and adenoidal hypertrophy.
What is the pharynx lined with?
The pharynx is lined with keratinised squamous epithelium like that of the mouth. The Eustachian tube opens into the lateral wall of the pharynx about 0.5 cm behind the edge of the soft palate (Hunt, 1924).
Why is the oropharynx lined with stratified squamous epithelium?
When food is swallowed, the multiple cell layers in the stratified epithelium help protect the underlying tissues from damage caused by food moving through the passageway.
What is the lateral recess?
Also known as Lee’s entrance, the lateral recess is the space within the spinal canal that is located toward the sides. (Lateral is a medical word for “side.”)
What is the lateral rectus muscle?
The lateral rectus muscle is one of the six extraocular muscles that control eye movements. It is responsible for abduction and is the only muscle that is innervated by the abducens nerve (CN VI).
What is rectus capitis lateralis?
Rectus capitis lateralis is a small, paired muscle that is found within the neck, deep to the prevertebral part of the deep cervical fascia. It is a part of the prevertebral muscle group along with splenius capitis, levator scapulae and middle and posterior scalene muscles.
What is the vastus lateralis?
Rochelle Collins, DO, is a board-certified family medicine doctor currently practicing in Bloomfield, Connecticut. The vastus lateralis is a muscle located on the lateral, or outside, part of your thigh. The muscle is one of the four quadriceps muscles and is the largest muscle of that group.