Dictionary » D » 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.

Please contribute to this project, if you have more information about this term feel free to edit this page

Results from our forum

Re: mammary gland of male in mammals

... the breast produces lactose when stimulated with prolactin--the hormone produced primarily during pregnancy and one that is necessary for milk production. Also because of testosterone, the male breast does not have as many lobes (mammary gland tissue) as the female breast has. However, again as ...

See entire post
by Annij
Sun Nov 03, 2013 4:47 am
Forum: Evolution
Topic: mammary gland of male in mammals
Replies: 18
Views: 21351

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 ...

See entire post
by kingofgameyg
Wed Apr 18, 2012 3:11 am
Forum: Human Biology
Topic: I need help about cardiovascular system.
Replies: 2
Views: 2928

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 ...

See entire post
by chikis
Mon Nov 14, 2011 12:35 pm
Forum: Physiology
Topic: Urine formation
Replies: 7
Views: 8378

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?

See entire post
by snezka18
Wed May 11, 2011 4:23 pm
Forum: Human Biology
Topic: Loop of Henle - Kidneys
Replies: 1
Views: 3522

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 ...

See entire post
by snezka18
Wed May 11, 2011 10:27 am
Forum: Human Biology
Topic: Kidneys and permeability to urea
Replies: 1
Views: 4323
View all matching forum results

This page was last modified 21:16, 3 October 2005. This page has been accessed 11,964 times. 
What links here | Related changes | Permanent link