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Dictionary » D » Duct

Duct

Duct

(Science: anatomy) a passage with well defined walls, especially a tube for the passage of excretions or secretions.

Synonym: ductus.

Origin: L. Ductus from ducere = to draw or lead a continuous tube formed by a row of elongated cells lacking intervening end walls.An enclosed conduit for a fluid.A bodily passage or tube lined with epithelial cells and conveying a secretion or other substance; the tear duct was obstructed; the alimentary canal; poison is released through a channel in the snakes fangs.Tubes responsible for carrying liquids.


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I need help about cardiovascular system.

... wall (F) 4/ The left ventricular wall is thicker than the right one because it pumps more blood, further each contraction (F) 5/ The allantoic duct drains wastes from the fetuses kidneys and large intestine. (T) ----------------------------------------- Name a vascular and a non-vascular lumen ...

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by kingofgameyg
Wed Apr 18, 2012 3:11 am
 
Forum: Human Biology
Topic: I need help about cardiovascular system.
Replies: 2
Views: 1010

Re: Urine formation

... the question :The amount of water saved and the final concentration of the urine depend on the permeability of the walls of the collecting duct. When the blood osmotic pressure increases, as duringg dehydration, more ADH is released from the pituitary gland. ADH increases the permeability ...

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by chikis
Mon Nov 14, 2011 12:35 pm
 
Forum: Physiology
Topic: Urine formation
Replies: 7
Views: 3079

Loop of Henle - Kidneys

... of that then? What is the purpose of Loop of Henle Where is Loop of henle permeable to urea, is it in the ascending limb? and then collecting duct is permeable to urea as well?

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by snezka18
Wed May 11, 2011 4:23 pm
 
Forum: Human Biology
Topic: Loop of Henle - Kidneys
Replies: 1
Views: 1859

Kidneys and permeability to urea

Hi Which part of the nephron would be permeable to urea? is it last part of the DCT and collecting duct? And is it regulated by the ADH hormone? Is this the only part where urea is reabsorbed and carried into meddula? Oh I am so confused here, permeable, not permeable, poorly ...

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by snezka18
Wed May 11, 2011 10:27 am
 
Forum: Human Biology
Topic: Kidneys and permeability to urea
Replies: 1
Views: 1847

Re: Kidneys and collecting tubule

I think I can help you. Even I had the same question. According to what I know collecting tubule leads to the collecting duct. And the collecting tubule is connected to the Distal convoluted tubule on the other end. That's how it is.

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by Adz795
Fri May 06, 2011 4:56 pm
 
Forum: Human Biology
Topic: Kidneys and collecting tubule
Replies: 1
Views: 1670
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