ÿþ <!DOCTYPE HTML PUBLIC "-//W3C//Dtd HTML 4.01 transitional//EN" "http://www.w3.org/tr/html4/loose.dtd"> <!-- Webpage Design by HTML Web Designing NewBie using NotePad, Thanks for Viewing, As my code may not be correct. ^^ --> <html> <head> <title>[MyAiMsT.NeT] AIMST University MBBS B12 - Histology Archive</title> <link rel="shortcut icon" href="../../../b12ico.ico"> <meta http-equiv="content-type" content="text/html; charset=utf-8"> <meta name="Author" content="John And Friends"> <meta name="description" content="MyAiMsT.NeT, AIMST UNIVERSITY Student made website for the students and also everyone who is interested in our Lifestyle in AIMST, at the same time learning HTML Webpublishing."> <meta name="keywords" content="AIMST, AIMST University, AIMST University Malaysia, University, Malaysia, Kedah, Lifestyle, Student, education"> <style type="text/css"> A:link { COLOR: #005177; TEXT-DECORATION: none; border: 0px } A:visited { COLOR: #005177; TEXT-DECORATION: none; border: 0px } A:hover { COLOR: #005177; TEXT-DECORATION: none } body { BACKGROUND-COLOR: #FFFFFF; PADDING-RIGHT: 0px; PADDING-LEFT: 0px; FONT-SIZE: 12px; MARGIN: 0px; PADDING-TOP: 0px; FONT-FAMILY: Verdana,Arial,tahoma ; } h1 {font-size:18px} h2 {font-size:15px} p {font-size:12px} div.topinfo {background-color: #FFF; color: #000; border: 2px solid #006699; text-align: center} div.center {text-align:center} td.bgblack {background-color: #000;} td.rgbg {background-image: URL(../rightborder.jpg) ;} td.lfbg {background-image: URL(../leftborder.jpg) ;} </style> </head> <body> <div class="topinfo"><strong> <a href="../../index.html"> Back to MBBS B12 Student Portal </a> </strong></div> <br><br> <!-- MBBS Batch 12 Events Photo Archive --> <table width="800" align="center" border="0" cellspacing="0" cellpadding="0"> <tr> <td colspan="3"> <a href="../index.html"><img src="../histoarchive.jpg" width="800" height="121" border="0" alt="MBBS Batch 12 Histology MicroPhoto Archive" ></a> </td></tr> <tr> <td width="40" class="rgbg"> </td> <td width="720"> <h1>BLOOD VESSEL</h1> <h2>Classification of blood vessels based on the structure</h2> <ol><li>Arteries <ul><li>Elastic, Large or conducting arteries <br>Conduct blood away from the heart. <br>Important in maintaining constant pressure in arterial system</li> <li>Muscular arteries or medium sized arteries <br>They distribute the blood to the tissues</li></ul></li> <li>Veins <ul><li>Large veins</li> <li>Medium sized veins</li></ul></li></ol> <h2> Wall of the blood vessels</h2> <P>Typically having three concentric layers.</p> <ol><li>Tunica intima  innermost layer</li> <li>Tunica media  middle layer</li> <li>Tunica adventitia (externa)  outermost layer</li></ol> <h2>Histology of elastic arteries</h2> <ul><li><strong>Tunica intima</strong>  thicker than in muscular arteries . Endothelium rests on thin basal lamina . Internal elastic lamina may be present between intima &amp; media, but hard to distinguish because of abundant elastin fibres in media.</li> <li><strong>Tunica media</strong>  contains abundant elastin as concentrically arranged interspersed with smooth muscle fibres.</li> <li><strong>Tunica adventitia</strong>  thin relative to vessel diameter, contains elastic &amp; type I collagen fibres ,Vasa vasora are seen.</li> <li>e.g.  aorta </li></ul> <h2>Histology of Muscular or distributing arteries</h2> <ul> <li><strong>Tunica intima</strong> - Contains typical endothelium &amp; subendothelial connective tissue. Prominent internal elastic lamina appears as wavy, refractile line between intima &amp; media.</li> <li><strong>Tunica media</strong> - Thick , Up to 40 layers of smooth muscle fibers. Collagen, elastic fibres &amp; proteoglycan vary.</li> <li><strong>Tunica adventitia</strong> - Relatively thin &amp; contains mostly collagen fibres</li></ul> <h2>Histology of Large veins</h2> <ul><li><strong> Tunica intima</strong> - Well developed &amp; include thick layer of subendothelial connective tissue. Extensions of intima protrude into lumens of large veins as valves.</li> <li><strong>Tunica media</strong>  several layers of smooth muscle cells &amp; abundant reticular &amp; collagen fibres. Elastin is sparse.</li> <li><strong>Tunica adventitia</strong>  best developed in large veins contains abundant collagen &amp; longitudinal bundles of smooth muscle that strengthen vessel to prevent distension.</li> <li>Eg.- Vena cava </li></ul> <h2>Histology of Small &amp; medium sized veins </h2> <p>Narrower than large veins &amp; have thin walls.</p> <ul><li><strong>Tunica intima</strong> -Typical endothelium, less subendothelial tissue. fewer valves than large veins, no internal elastic lamina.</li> <li><strong>Tunica media</strong> -Thin relative to vessel diameter. Few elastic fibres.</li> <li><strong>Tunica adventitia</strong> - Relatively thick, but unlike large veins contains little of any muscle. Mostly collagen. </li> <li><strong>e.g.</strong>- saphenous, hepatic, portal etc.</li></ul> <iframe src="largeelasticartery10x.jpg" align="middle" frameborder="0" name="subframe" scrolling="no" width="720" height="620">ERROR: IFRAME LOAD FAILED.</iframe> <hr> <div class="center"> Click to enlarge </div> <div><strong>Artery</strong></div> <a href="largeelasticartery10x.jpg" target="subframe"><img src="th/largeelasticartery10xs.jpg" border="0" width="200" height="171" alt=""></a> <a href="muscularartery4x.jpg" target="subframe"><img src="th/muscularartery4xs.jpg" border="0" width="200" height="171" alt=""></a> <a href="muscularartery10x.jpg" target="subframe"><img src="th/muscularartery10xs.jpg" border="0" width="200" height="171" alt=""></a> <a href="muscularartery10x2.jpg" target="subframe"><img src="th/muscularartery10x2s.jpg" border="0" width="200" height="171" alt=""></a> <a href="arteryandvein4x.jpg" target="subframe"><img src="th/arteryandvein4xs.jpg" border="0" width="200" height="171" alt=""></a> <hr> <div><strong>Vein</strong></div> <a href="largevein4x.jpg" target="subframe"><img src="th/largevein4xs.jpg" border="0" width="200" height="171" alt=""></a> <a href="largevein10x.jpg" target="subframe"><img src="th/largevein10xs.jpg" border="0" width="200" height="171" alt=""></a> <a href="largevein40x.jpg" target="subframe"><img src="th/largevein40xs.jpg" border="0" width="200" height="171" alt=""></a> <a href="largevein40x2.jpg" target="subframe"><img src="th/largevein40x2s.jpg" border="0" width="200" height="171" alt=""></a> <a href="largevein40x3.jpg" target="subframe"><img src="th/largevein40x3s.jpg" border="0" width="200" height="171" alt=""></a> </td> <td width="40"class="lfbg"> </td> </tr> <tr> <td colspan="3" > <img src="../lowborder.jpg" width="800" height="50" border="0" alt=""> </td></tr></table> <br><br> <div class="center"><strong>We Are Fueled By Google Ads.</strong> <script type="text/javascript"><!-- google_ad_client = "pub-0258798110720955"; /* 728x90, created 9/2/08 */ google_ad_slot = "0115340828"; google_ad_width = 728; google_ad_height = 90; //--> </script> <script type="text/javascript" src="http://pagead2.googlesyndication.com/pagead/show_ads.js"> </script></div> </body> </html>