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Encyclopedia > Cricoid
Cricoid
Anterolateral view of head and neck. (Cricoid cartilage labeled at center left.)
The ligaments of the larynx. Antero-lateral view. (Cricoid cartilage visible near bottom center.)
Latin cartilago cricoidea
Gray's subject #236 1074
Precursor 4th and 6th branchial arch
MeSH Cricoid+Cartilage

The cricoid cartilage, or simply cricoid (from the Greek krikoeides meaning "ring-shaped"), is the only complete ring of cartilage around the trachea. Image File history File links Gray1194. ... Image File history File links Gray951. ... For other uses, see Latin (disambiguation). ... This article or section is in need of attention from an expert on the subject. ... In the development of vertebrate animals, the branchial arches (or pharyngeal arches) develop during the fourth and fifth week in utero as a series of mesodermal outpouchings on the left and right sides of the developing pharynx. ... Medical Subject Headings (MeSH) is a huge controlled vocabulary (or metadata system) for the purpose of indexing journal articles and books in the life sciences. ... Cartilage is a type of dense connective tissue. ... Windpipe redirects here. ...

Contents

Location

It sits just inferior to the thyroid cartilage in the neck, and is joined to it medially by the median cricothyroid ligament and postero-laterally by the cricothyroid joints. Inferior to it are the rings of cartilage around the trachea (which are not continuous - rather they are C-shaped with a gap posteriorly). The cricoid is joined to the first tracheal ring by the cricotracheal ligament, and this can be felt as a more yielding area between the firm thyroid cartilage and firmer cricoid. The cartilages of the larynx. ... For other uses, see Neck (disambiguation). ... The cricothyroid ligament is the larger part of the laryngeal membrane, continuing inferiorly as a median or anterior part and twin lateral ligaments. ... The anatomical planes The anatomical position is a schematic convention for describing the relative morphology of the human body. ... The cricotracheal ligament connects the cricoid cartilage with the first ring of the trachea. ...


It is also anatomically related to the thyroid gland; although the thyroid isthmus is inferior to it, the two lobes of the thyroid extend superiorly on each side of the cricoid as far as the thyroid cartilage above it. For other uses, see Isthmus (disambiguation). ...


The posterior part of the cricoid is slightly broader than the anterior and lateral parts, and is called the lamina, while the anterior part is the band; this may be the reason for the common comparison made between the cricoid and a signet ring. In sciences dealing with the anatomy of animals, precise anatomical terms of location are necessary for a variety of reasons. ... Lamina is a general anatomical term meaning plate or layer. ... In zootomy, several terms are used to describe the location of organs and other structures in the body of bilateral animals. ...


Function

The function of the cricoid is to provide attachments for the various muscles, cartilages, and ligaments involved in opening and closing the airway and in speech production. For other uses of Muscles, see Muscles (disambiguation). ... In anatomy, the term ligament is used to denote three different types of structures:[1] Fibrous tissue that connects bones to other bones. ... Windpipe redirects here. ... In linguistics, manner of articulation describes how the tongue, lips, and other speech organs involved in making a sound make contact. ...


Composition

It is made of hyaline cartilage, and so can become calcified or even ossified, particularly in old age. Cartilage is type of dense connective tissue. ... Categories: Stub ... Ossification is the process of bone formation, in which connective tissues, such as cartilage are turned to bone or bone-like tissue. ...


Clinical significance

When intubating a patient under general anesthesia prior to surgery, the anesthesiologist will press on the cricoid cartilage to compress the esophagus behind it so as to prevent gastric reflux from occurring. Intubation being practiced on a dummy (conventional technique using a laryngoscope). ... This article or section may be confusing for some readers, and should be edited to be clearer. ... An anesthesiologist (American English), or anaesthetist (British English), also anaesthesiologist, is a medical doctor trained to administer anesthesia and manage the medical care of patients before, during, and after surgery. ... Gastroesophageal Reflux Disease (GERD or GORD using the British œsophageal) is defined as chronic symptoms or mucosal damage produced by the abnormal reflux in the esophagus[1]. This is commonly due to transient or permanent changes in the barrier between the esophagus and the stomach. ...


Gastric reflux could cause aspiration if this is not done considering the general anesthesia can cause relaxation of the gastro-esophageal sphincter allowing stomach contents to ascend through the esophagus into the trachea. Look up aspiration, aspirate in Wiktionary, the free dictionary. ... This article is about the cardia in the human body. ...


Additional images

See also

Completed tracheotomy: 1 - Vocal cords 2 - Thyroid cartilage 3 - Cricoid cartilage 4 - Tracheal cartilages 5 - Balloon cuff A tracheotomy is a procedure performed by paramedics, emergency physicians and surgeons in order to secure an airway. ...

External links


  Results from FactBites:
 
XI. Splanchnology. 1a. The Larynx. Gray, Henry. 1918. Anatomy of the Human Body. (4530 words)
The arch (arcus cartilaginis cricoideæ; anterior portion) is narrow and convex, and measures vertically from 5 to 7 mm.; it affords attachment externally in front and at the sides to the Cricothyreiodei, and behind, to part of the Constrictor pharyngis inferior.
The lower border of the cricoid cartilage is horizontal, and connected to the highest ring of the trachea by the cricotracheal ligament.
It arises from the upper border of the arch of the cricoid cartilage, and, passing obliquely upward and backward, is inserted into the front of the muscular process of the arytenoid cartilage.
  More results at FactBites »


 
 

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