File:Keith1902 fig040.jpg - Revision history

Z8600021: /* Fig. 40. Showing the Cavities derived from the Inner Recess of the First Cleft */

2015-05-18T07:09:46Z

Fig. 40. Showing the Cavities derived from the Inner Recess of the First Cleft

← Older revision		Revision as of 18:09, 18 Mayıs 2015
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	==Fig. 40. Showing the Cavities derived from the Inner Recess of the First Cleft==		==Fig. 40. Showing the Cavities derived from the Inner Recess of the First Cleft==

	The Eustachian tube is derived from the first inner cleft recess of the pharynx ([[Book_-_Human_Embryology_and_Morphology_4#Fig039\|Fig. 39]]) and retains through life the ciliated epithelial lining of the primitive pharynx. It is 1.45 inches long. Its inner two thirds is bounded behind by a triangular plate of cartilage, which is attached at its inner or pharyngeal end to the internal pterygoid plate, a derivative, with the incus, of the pterygo-palatine bar ([[Book_-_Human_Embryology_and_Morphology_1#Fig010a-c\|Fig. 10 C]]). The cartilage is developed in the walls of the 1st visceral cleft in the 4th month of foetal life. The tympanic plate grows inwards and forms the floor of its outer third (Fig. 40), while the periotic capsule (petro-mastoid) which is developed above and behind the 1st cleft, grows over and forms the roof of its outer third. The part of the petro-mastoid which grows over it, is the tegmen tympani ; it also forms the roof of the tympanum and antrum of the mastoid. It forms the roof of all the cavities derived from the inner recess of the first cleft (Fig. 40). The anterior edge of the tegmen tympani appears in the Glaserian fissure. The tensor tympani and tensor palati are developed on the mandibular side of the first cleft and are supplied from the nerve of the mandibular process through the otic ganglion.		The Eustachian tube is derived from the first inner cleft recess of the pharynx ([[Book_-_Human_Embryology_and_Morphology_4#Fig039\|Fig. 39]]) and retains through life the ciliated epithelial lining of the primitive pharynx. It is 1.45 inches long. Its inner two thirds is bounded behind by a triangular plate of cartilage, which is attached at its inner or pharyngeal end to the internal pterygoid plate, a derivative, with the incus, of the pterygo-palatine bar ([[Book_-_Human_Embryology_and_Morphology_1#Fig010a-c\|Fig. 10 C]]).


			The cartilage is developed in the walls of the 1st visceral cleft in the 4th month of foetal life. The tympanic plate grows inwards and forms the floor of its outer third (Fig. 40), while the periotic capsule (petro-mastoid) which is developed above and behind the 1st cleft, grows over and forms the roof of its outer third. The part of the petro-mastoid which grows over it, is the tegmen tympani ; it also forms the roof of the tympanum and antrum of the mastoid. It forms the roof of all the cavities derived from the inner recess of the first cleft (Fig. 40). The anterior edge of the tegmen tympani appears in the Glaserian fissure. The tensor tympani and tensor palati are developed on the mandibular side of the first cleft and are supplied from the nerve of the mandibular process through the otic ganglion.

Z8600021 at 07:17, 19 Mayıs 2014

2014-05-19T07:17:46Z

← Older revision		Revision as of 18:17, 19 Mayıs 2014
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	==Fig. 40. Showing the Cavities derived from the Inner Recess of the First Cleft==		==Fig. 40. Showing the Cavities derived from the Inner Recess of the First Cleft==

	The Eustachian tube is derived from the first inner cleft recess of the pharynx ([[Book_-_Human_Embryology_and_Morphology_4#Fig039\|Fig. 39]]) and retains through life the ciliated epithelial lining of the primitive pharynx. It is 1.45 inches long. Its inner two thirds is bounded behind by a triangular plate of cartilage, which is attached at its inner or pharyngeal end to the internal pterygoid plate, a derivative, with the incus, of the pterygo-palatine bar (Fig. 10 C). The cartilage is developed in the walls of the 1st visceral cleft in the 4th month of foetal life. The tympanic plate grows inwards and forms the floor of its outer third (Fig. 40), while the periotic capsule (petro-mastoid) which is developed above and behind the 1st cleft, grows over and forms the roof of its outer third. The part of the petro-mastoid which grows over it, is the tegmen tympani ; it also forms the roof of the tympanum and antrum of the mastoid. It forms the roof of all the cavities derived from the inner recess of the first cleft (Fig. 40). The anterior edge of the tegmen tympani appears in the Glaserian fissure. The tensor tympani and tensor palati are developed on the mandibular side of the first cleft and are supplied from the nerve of the mandibular process through the otic ganglion.		The Eustachian tube is derived from the first inner cleft recess of the pharynx ([[Book_-_Human_Embryology_and_Morphology_4#Fig039\|Fig. 39]]) and retains through life the ciliated epithelial lining of the primitive pharynx. It is 1.45 inches long. Its inner two thirds is bounded behind by a triangular plate of cartilage, which is attached at its inner or pharyngeal end to the internal pterygoid plate, a derivative, with the incus, of the pterygo-palatine bar ([[Book_-_Human_Embryology_and_Morphology_1#Fig010a-c\|Fig. 10 C]]). The cartilage is developed in the walls of the 1st visceral cleft in the 4th month of foetal life. The tympanic plate grows inwards and forms the floor of its outer third (Fig. 40), while the periotic capsule (petro-mastoid) which is developed above and behind the 1st cleft, grows over and forms the roof of its outer third. The part of the petro-mastoid which grows over it, is the tegmen tympani ; it also forms the roof of the tympanum and antrum of the mastoid. It forms the roof of all the cavities derived from the inner recess of the first cleft (Fig. 40). The anterior edge of the tegmen tympani appears in the Glaserian fissure. The tensor tympani and tensor palati are developed on the mandibular side of the first cleft and are supplied from the nerve of the mandibular process through the otic ganglion.

Z8600021 at 07:15, 19 Mayıs 2014

2014-05-19T07:15:35Z

← Older revision		Revision as of 18:15, 19 Mayıs 2014
Line 1:		Line 1:
	==Fig. 40 Showing the Cavities derived from the Inner Recess of the First Cleft==		==Fig. 40. Showing the Cavities derived from the Inner Recess of the First Cleft==

			The Eustachian tube is derived from the first inner cleft recess of the pharynx ([[Book_-_Human_Embryology_and_Morphology_4#Fig039\|Fig. 39]]) and retains through life the ciliated epithelial lining of the primitive pharynx. It is 1.45 inches long. Its inner two thirds is bounded behind by a triangular plate of cartilage, which is attached at its inner or pharyngeal end to the internal pterygoid plate, a derivative, with the incus, of the pterygo-palatine bar (Fig. 10 C). The cartilage is developed in the walls of the 1st visceral cleft in the 4th month of foetal life. The tympanic plate grows inwards and forms the floor of its outer third (Fig. 40), while the periotic capsule (petro-mastoid) which is developed above and behind the 1st cleft, grows over and forms the roof of its outer third. The part of the petro-mastoid which grows over it, is the tegmen tympani ; it also forms the roof of the tympanum and antrum of the mastoid. It forms the roof of all the cavities derived from the inner recess of the first cleft (Fig. 40). The anterior edge of the tegmen tympani appears in the Glaserian fissure. The tensor tympani and tensor palati are developed on the mandibular side of the first cleft and are supplied from the nerve of the mandibular process through the otic ganglion.

Z8600021: ==Fig. 40 Showing the Cavities derived from the Inner Recess of the First Cleft== {{Keith1902_4_figures}} {{Human embryology morphology 1902 footer}}

2013-12-29T16:38:46Z

==Fig. 40 Showing the Cavities derived from the Inner Recess of the First Cleft== {{Keith1902_4_figures}} {{Human embryology morphology 1902 footer}}

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==Fig. 40 Showing the Cavities derived from the Inner Recess of the First Cleft==

{{Keith1902_4_figures}}

{{Human embryology morphology 1902 footer}}