File:Buell-plate02.jpg - Revision history

Z8600021 at 06:35, 23 Ocak 2013

2013-01-23T06:35:46Z

← Older revision		Revision as of 17:35, 23 Ocak 2013
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	==Origin of the Pulmonary Vessels in the Chick - Plate 2==		==Origin of the Pulmonary Vessels in the Chick - Plate 2==

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	===Fig. 7===		===Fig. 7===
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	tributary loses its arterial connections and disappears. The pulmonary arches (sixth) have undergone		tributary loses its arterial connections and disappears. The pulmonary arches (sixth) have undergone
	rapid growth and have included the arteries within their walls.		rapid growth and have included the arteries within their walls.

			{{Buell1922}}


	:'''Links:''' [[Book_-_Contributions_to_Embryology\|Carnegie Institution of Washington - Contributions to Embryology]] \| [[Chicken Development]] \| [[Respiratory System Development]]		:'''Links:''' [[Book_-_Contributions_to_Embryology\|Carnegie Institution of Washington - Contributions to Embryology]] \| [[Chicken Development]] \| [[Respiratory System Development]]


			{{Historic Disclaimer}}

	[[Category:Cardiovascular]] [[Category:Historic Embryology]] [[Category:Chicken]] [[Category:Respiratory]]		[[Category:Cardiovascular]] [[Category:Historic Embryology]] [[Category:Chicken]] [[Category:Respiratory]]

Z8600021: uploaded a new version of "File:Buell-plate02.jpg": JP2 scan

2013-01-23T06:35:10Z

uploaded a new version of "File:Buell-plate02.jpg": JP2 scan

← Older revision

Revision as of 17:35, 23 Ocak 2013

S8600021 at 02:26, 29 March 2011

2011-03-29T02:26:12Z

← Older revision		Revision as of 13:26, 29 March 2011
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	{{Template:Historic Disclaimer}}		{{Template:Historic Disclaimer}}

	~~{{Template:Historic Disclaimer}}~~

	===Fig. 7===		===Fig. 7===

S8600021 at 02:05, 29 March 2011

2011-03-29T02:05:13Z

← Older revision		Revision as of 13:05, 29 March 2011
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	==Plate 2==		==Origin of the Pulmonary Vessels in the Chick - Plate 2==

			{{Template:Historic Disclaimer}}

	{{Template:Historic Disclaimer}}		{{Template:Historic Disclaimer}}

S8600021 at 02:04, 29 March 2011

2011-03-29T02:04:16Z

← Older revision		Revision as of 13:04, 29 March 2011
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	==Plate 2==		==Plate 2==

			{{Template:Historic Disclaimer}}

	===Fig. 7===		===Fig. 7===

S8600021 at 02:04, 29 March 2011

2011-03-29T02:04:03Z

← Older revision		Revision as of 13:04, 29 March 2011
Line 46:		Line 46:
	tributary loses its arterial connections and disappears. The pulmonary arches (sixth) have undergone		tributary loses its arterial connections and disappears. The pulmonary arches (sixth) have undergone
	rapid growth and have included the arteries within their walls.		rapid growth and have included the arteries within their walls.


			:'''Links:''' [[Book_-_Contributions_to_Embryology\|Carnegie Institution of Washington - Contributions to Embryology]] \| [[Chicken Development]] \| [[Respiratory System Development]]

	[[Category:Cardiovascular]] [[Category:Historic Embryology]] [[Category:Chicken]] [[Category:Respiratory]]		[[Category:Cardiovascular]] [[Category:Historic Embryology]] [[Category:Chicken]] [[Category:Respiratory]]

S8600021: ==Plate 2== ===Fig. 7=== From an injected embryo of 35 somites, 55 hours' incubation, dissected by the paraffin method. The lung consists of a simple ventral diverticulum beginning to show lateral swellings into right and left primary buds. The common

2011-03-29T01:56:57Z

New page

==Plate 2==

===Fig. 7===
From an injected embryo of 35 somites, 55 hours' incubation, dissected by the paraffin method. The lung
consists of a simple ventral diverticulum beginning to show lateral swellings into right and left primary
buds. The common pulmonary vein opens into the sinus at the level of the lung rudiment. It drains
the capillaries of both cephalic and post-caval portions of the splanchnic plexus. The anastomoses
between the plexus and the cardinal veins are established. The pulmonary arches are not formed,
although the dorsal and ventral primordia of the arch are indicated by the blind pouches. The cranial
end of the pulmonary artery is now easily recognized in the capillary plexus.

===Fig. 8===
A 36-somite chick of 60 hours' incubation, injected with ink and dissected by the paraffin method. Only the
right half of the vascular tree is shown. This stage is but slightly older than that in figure 7. The,
pulmonary arch is now complete but still retains a capillary appearance. The pulmonary artery
can be recognized in the cephalic portion of the plexus. The right lobar tributary of the common vein
is formed and is connected with its corresponding artery on the dorsal surface of the lung-bud. The
cranial tributary of the common vein is plainly seen. The wall of the sinus venosus has been removed
to show the opening of the common pulmonary vein into the sinus.

===Figs. 9-10===
Dissections of injected chick embryos of 85 hours' incubation. Figure 9 shows the right side of the
pulmonary system. In figure 10 the spinal cord, dorsal aorta, and dorsal surface of the gut have been
removed, exposing the pulmonary system in a coronal plane from a dorsal view. The lung is in a
simple stage of right and left primary buds which do not show further lobulation. The left bud is
more ventral than the right and is parallel to the gut. The right bud tends more toward a horizontal
position in relation to the plane of the gut. The pulmonary vessels bear a constant relation to the
bronchi of the buds, even at this early stage. The artery lies dorsal and lateral to the bronchus; the
vein, ventral and medial to the bronchus, the lung capillaries lying between the two on the dorsal
surface of the buds. The pulmonary artery comes off from the arch at the junction of its middle and
proximal third, and passes directly back to the tip of the lung-bud, where it joins freely, in a capillary
net, with the corresponding tributary of the pulmonary vein. Very near the arch a capillary connection is given off to the anterior cardinal vein. The two arteries extend parallel to each other and in their proximal third are joined by numerous capillary anastomoses which are drained by the cranial
tributary of the common vein. The middle third of the artery has no branches. The entire distal
third is connected with the vein by a rich plexus of capillaries over the dorsal surface of the lung-bud.
A few twigs are still present, connecting with the post-caval portion of the plexus. The pulmonary
vein is made up of several tributaries which unite in a common trunk; this in turn empties into the
sinus venosus. Considerable variation is encountered in the pattern of these branches in different
specimens. The right and left lobar branches to the lung-buds drain their respective arteries. In
figure 9 a vessel connects the right lobar vein to the cranial tributary. This is not constant and is
absent in figure 10. A few small branches to the post-caval plexus are seen caudal to the lobar
branches. The cranial tributary of the common vein drains the anastomotic vessels between the two
pulmonary arteries and arches. It extends directly caudad on the ventral surface of the gut and,
with the other tributaries, empties into the common vein. It may have but one opening into the
common vein, as in figure 10. This stage is about the oldest in which the cranial tributary is seen
complete and represents its highest development. In a later stage, as described by Squier, the cranial
tributary loses its arterial connections and disappears. The pulmonary arches (sixth) have undergone
rapid growth and have included the arteries within their walls.

[[Category:Cardiovascular]] [[Category:Historic Embryology]] [[Category:Chicken]] [[Category:Respiratory]]