File:Gray0974.jpg - Revision history

Z8600021 at 22:12, 21 August 2012

2012-08-21T22:12:07Z

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			:[[Respiratory System Development\|Links]]: [[:File:Lung primary lobule 01.jpg\|Primary Lung Lobule]] \| [[:File:Gray0975.jpg\|Gray 975]] \| [[:File:Lung_secondary_lobule_01.jpg\|Secondary Lung Lobule]] \| [[:File:Gray0974.jpg\|Gray 974]] \| [[Respiratory System Development]]
	===Lung Structure===		===Lung Structure===

Z8600021: /* Lung Anatomy - Secondary Lobule */

2012-08-21T21:55:56Z

Lung Anatomy - Secondary Lobule

← Older revision		Revision as of 08:55, 22 August 2012
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	Part of a secondary lobule from the depth of a human lung, showing parts of several primary lobules.		Part of a secondary lobule from the depth of a human lung, showing parts of several primary lobules.

	Camera drawing of one 50 μm section. X 20 diameters. (Miller.)		Camera drawing of one 50 μm section. X 20 diameters. (Miller.) See also [[:File:Lung_secondary_lobule_01.jpg\|Labeled version]]
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			===Lung Structure===

	~~See also [[:File:Lung_secondary_lobule_01~~.~~jpg\|Labeled version]]~~		The lungs are composed of an external serous coat, a subserous areolar tissue and the pulmonary substance or parenchyma.

			The serous coat is the pulmonary pleura it is thin, transparent, and invests the entire organ as far as the root.

			The subserous areolar tissue contains a large proportion of elastic fibers; it invests the entire surface of the lung, and extends inward between the lobules.

			The parenchyma is composed of secondary lobules which, although closely connected together by an interlobular areolar tissue, are quite distinct from one another, and may be teased asunder without much difficulty in the fetus. The secondary lobules vary in size; those on the surface are large, of pyramidal form, the base turned toward the surface; those in the interior smaller, and of various forms. Each secondary lobule is composed of several primary lobules, the anatomical units of the lung. The primary lobule consists of an alveolar duct, the air spaces connected with it and their bloodvessels, lymphatics and nerves.

			The intrapulmonary bronchi divide and subdivide throughout the entire organ, the smallest subdivisions constituting the lobular bronchioles. The larger divisions consist of: (1) an outer coat of fibrous tissue in which are found at intervals irregular plates of hyaline cartilage, most developed at the points of division; (2) internal to the fibrous coat, a layer of circularly disposed smooth muscle fibers, the bronchial muscle; and (3) most internally, the mucous membrane, lined by columnar ciliated epithelium resting on a basement membrane. The corium of the mucous membrane contains numerous elastic fibers running longitudinally, and a certain amount of lymphoid tissue; it also contains the ducts of mucous glands, the acini of which lie in the fibrous coat. The lobular bronchioles differ from the larger tubes in containing no cartilage and in the fact that the ciliated epithelial cells are cubical in shape. The lobular bronchioles are about 0.2 mm. in diameter.

			Each bronchiole divides into two or more respiratory bronchioles, with scattered alveoli, and each of these again divides into several alveolar ducts, with a greater number of alveoli connected with them. Each alveolar duct is connected with a variable number of irregularly spherical spaces, which also possess alveoli, the atria. With each atrium a variable number (2–5) of alveolar sacs are connected which bear on all parts of their circumference alveoli or air sacs. (Miller.)

			The alveoli are lined by a delicate layer of simple squamous epithelium, the cells of which are united at their edges by cement substance. Between the squames are here and there smaller, polygonal, nucleated cells. Outside the epithelial lining is a little delicate connective tissue containing numerous elastic fibers and a close net-work of blood capillaries, and forming a common wall to adjacent alveoli ([[:File:Gray0974.jpg\|Fig. 975]]).

			(Text modified from Gray's Anatomy)

	{{Gray Anatomy}}		{{Gray Anatomy}}

	[[Category:Respiratory]] [[Category:Historic Embryology]] [[Category:Gray's 1918 Anatomy]]		[[Category:Respiratory]] [[Category:Historic Embryology]] [[Category:Gray's 1918 Anatomy]]

Z8600021: /* Lung Anatomy - Secondary Lobule */

2012-08-16T17:31:32Z

Lung Anatomy - Secondary Lobule

← Older revision		Revision as of 04:31, 17 August 2012
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	* '''s''' - septum between secondary lobules		* '''s''' - septum between secondary lobules
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			See also [[:File:Lung_secondary_lobule_01.jpg\|Labeled version]]


	{{Gray Anatomy}}		{{Gray Anatomy}}

	[[Category:Respiratory]] [[Category:Historic Embryology]] [[Category:Gray's 1918 Anatomy]]		[[Category:Respiratory]] [[Category:Historic Embryology]] [[Category:Gray's 1918 Anatomy]]

Z8600021: /* Lung Anatomy - Secondary Lobule */

2012-08-16T17:01:16Z

Lung Anatomy - Secondary Lobule

← Older revision		Revision as of 04:01, 17 August 2012
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	{{~~Grays~~ Anatomy}}		{{Gray Anatomy}}

	[[Category:Respiratory]] [[Category:Historic Embryology]] [[Category:Gray's 1918 Anatomy]]		[[Category:Respiratory]] [[Category:Historic Embryology]] [[Category:Gray's 1918 Anatomy]]

Z8600021 at 17:00, 16 August 2012

2012-08-16T17:00:56Z

← Older revision		Revision as of 04:00, 17 August 2012
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	Camera drawing of one 50 μm section. X 20 diameters. (Miller.)		Camera drawing of one 50 μm section. X 20 diameters. (Miller.)
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	# bronchiole		# bronchiole
	# respiratory bronchiole		# respiratory bronchiole
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	# alveolar sac		# alveolar sac
	# alveolus or air cell		# alveolus or air cell
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	* '''m''' - smooth muscle		* '''m''' - smooth muscle
	* '''a''' - branch pulmonary artery		* '''a''' - branch pulmonary artery
	* '''v''' - branch pulmonary vein		* '''v''' - branch pulmonary vein
	* '''s''' - septum between secondary lobules		* '''s''' - septum between secondary lobules
			\|}

			{{Grays Anatomy}}

	[[Category:Respiratory]] [[Category:Historic Embryology]] [[Category:Gray's 1918 Anatomy]]		[[Category:Respiratory]] [[Category:Historic Embryology]] [[Category:Gray's 1918 Anatomy]]

Z8600021: /* Lung Anatomy */

2012-02-29T06:55:17Z

Lung Anatomy

← Older revision		Revision as of 17:55, 29 February 2012
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	==Lung Anatomy==		==Lung Anatomy - Secondary Lobule==

	Part of a secondary lobule from the depth of a human lung, showing parts of several primary lobules.		Part of a secondary lobule from the depth of a human lung, showing parts of several primary lobules.

	Camera drawing of one 50 μ section. X 20 diameters. (Miller.)		Camera drawing of one 50 μm section. X 20 diameters. (Miller.)

	# bronchiole		# bronchiole

Z8600021: uploaded a new version of "File:Gray0974.jpg"

2012-02-29T06:36:19Z

uploaded a new version of "File:Gray0974.jpg"

← Older revision	Revision as of 17:36, 29 February 2012
(No difference)

Z8600021 at 06:35, 29 February 2012

2012-02-29T06:35:31Z

← Older revision		Revision as of 17:35, 29 February 2012
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	==Lung Anatomy==		==Lung Anatomy==

	Part of a secondary lobule from the depth of a human lung, showing parts of several primary lobules. Camera drawing of one 50 μ section. X 20 diameters. (Miller.)		Part of a secondary lobule from the depth of a human lung, showing parts of several primary lobules.

			Camera drawing of one 50 μ section. X 20 diameters. (Miller.)

	# bronchiole		# bronchiole
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	# alveolus or air cell		# alveolus or air cell

	* m - smooth muscle		* '''m''' - smooth muscle
	* a - branch pulmonary artery		* '''a''' - branch pulmonary artery
	* v - branch pulmonary vein		* '''v''' - branch pulmonary vein
	* s - septum between secondary lobules		* '''s''' - septum between secondary lobules

	[[Category:Respiratory]] [[Category:Historic Embryology]] [[Category:Gray's 1918 Anatomy]]		[[Category:Respiratory]] [[Category:Historic Embryology]] [[Category:Gray's 1918 Anatomy]]

S8600021 at 21:02, 27 February 2012

2012-02-27T21:02:27Z

← Older revision		Revision as of 08:02, 28 February 2012
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			==Lung Anatomy==

	Part of a secondary lobule from the depth of a human lung, showing parts of several primary lobules. Camera drawing of one 50 μ section. X 20 diameters. (Miller.)		Part of a secondary lobule from the depth of a human lung, showing parts of several primary lobules. Camera drawing of one 50 μ section. X 20 diameters. (Miller.)

S8600021 at 23:17, 24 August 2009

2009-08-24T23:17:31Z

← Older revision		Revision as of 10:17, 25 August 2009
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	* v - branch pulmonary vein		* v - branch pulmonary vein
	* s - septum between secondary lobules		* s - septum between secondary lobules

			[[Category:Respiratory]] [[Category:Historic Embryology]] [[Category:Gray's 1918 Anatomy]]