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Tunica

tunica

Synonym: tunic.

Origin: L. A coat


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Re: veins (alevel help!)

Indeed, veins do have SMCs in their tunica media! This muscle layer is however not as thick as the SMC-layer in arteries, since arterial vessels have to cope with much higher pressures. In order to constrict a vessel with a BP of 100 mm Hg ...

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by Swede
Tue Feb 23, 2010 9:50 pm
 
Forum: Physiology
Topic: veins (alevel help!)
Replies: 7
Views: 11650

veins (alevel help!)

... pressure than the veins, so it would make sense that the arteries are thicker, I think it is the middle layer not the external. Something like tunica medious or something, cant remember. So bottom line, arteries have to be stronger than vein as they have more pressure.

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by MichaelXY
Sun Mar 29, 2009 10:18 am
 
Forum: Physiology
Topic: veins (alevel help!)
Replies: 7
Views: 11650

veins (alevel help!)

... in anatomy i am now seriously doubting my sports textbook please help!!! who is right!!! also, my sports textbook says that veins have a thicker tunica externa so it can withstand the pressure when the blood pools but in biology arteries and veins have a tunica externa which is the same thickness ...

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by laurenjane
Sat Mar 21, 2009 11:51 am
 
Forum: Physiology
Topic: veins (alevel help!)
Replies: 7
Views: 11650

What is the role of Smooth Muscle in Aorta?

:?: What is the Role of Smooth Muscles in the Aorta? From what i know the smooth muscles are found in the Tunica Media of the Aorta (and also almost all blood vessels except the capillaries). They alternate with the Elastic Fibers. I know that the role of Elastic fibers is to ...

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by biophillic
Wed Oct 24, 2007 2:40 pm
 
Forum: Human Biology
Topic: What is the role of Smooth Muscle in Aorta?
Replies: 3
Views: 3352

The Fiber Disease

... Enteric lesions can be severe, often with demonstration of bacilli in epithelial cells and smooth muscle cells of the muscularis mucosa and tunica muscularis interna and externa. The most frequently encountered lesion in all species of affected animals is focal hepatic necrosis. Since the ...

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by Skytroll
Sat Nov 04, 2006 3:48 pm
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 5411648
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