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Small intestine lining, SEM
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Small intestine lining, SEM
Small intestine villi. Coloured scanning electron micrograph (SEM) of villi (folds) on the lining of the small intestine. Villi greatly increase the intestinal surface area for absorbing nutrients from food. The epithelium (outer layer, folded) of each villus contains enterocyte cells, which are involved in nutrient absorption, and goblet cells, which secrete mucus onto the intestinal surface. The inner villus tissue (not seen) contains blood vessels which transport digestive products to a nearby vein. Magnification: x21 at 6x7cm size
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Media ID 6450219
© SUSUMU NISHINAGA/SCIENCE PHOTO LIBRARY
Absorption Absorptive Alimentary Canal Digestion Digestive System Lining Mucosa Mucosal Nutrient Projection Projections Secretory Site Small Intestine Surface Area Tissue Tract Villi Villus
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This print showcases the intricate and vibrant world of the small intestine lining. Through a coloured scanning electron micrograph (SEM), we are granted a glimpse into the fascinating structure of small intestine villi. These delicate folds play a crucial role in our digestive system, as they dramatically increase the surface area for absorbing vital nutrients from our food. The outer layer of each villus, known as the epithelium, is beautifully folded and houses enterocyte cells responsible for nutrient absorption. Additionally, goblet cells can be observed secreting mucus onto the intestinal surface to aid in digestion. Although not visible in this image, deep within these projections lie blood vessels that transport digested products to nearby veins. With a magnification of x21 at 6x7cm size, this SEM highlights both the complexity and efficiency of our gut's anatomy. The healthy tissue portrayed here represents normal digestion within the human body's alimentary canal. Through this striking visual representation captured by Science Photo Library, we gain an appreciation for how mucosal absorptive projections like villi contribute to optimal nutrient absorption and overall well-being.
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