Brush Border Collection

Intestinal brush border, TEM
Intestinal brush border. Transmission electron micrograph (TEM) of intestinal absorptive cells sectioned horizontally at their apex to show the surface microvilli (round)

TEM of Giardia lamblia
Coloured Transmission Electron Micrograph of Giardia lamblia (orange), a parasitic flagellate protozoan which causes the disease lambliasis (giardiasis)

Coloured TEM of microvilli of intestinal cell

Sperm cell, SEM
Sperm cell. Coloured scanning electron micrograph (SEM) of a sperm cell in a fallopian tube. Magnification: x400 when printed at 10 centimetres wide

Small intestine structures, artwork
Small intestine structures. Artwork sequence of magnified views of the small intestine, with the magnification increasing from top to bottom

Intestinal villi anatomy, artwork
Intestinal villi anatomy. Artwork showing six types of cell found on the surface of villi in the small intestine. Clockwise from upper right they are: enterocytes (green)

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The brush border, also known as the intestinal microvilli, is a fascinating feature of the small intestine that plays a crucial role in nutrient absorption. When observed under a transmission electron microscope (TEM), this intricate structure reveals its remarkable complexity. In the TEM image of the intestinal brush border, one can see countless tiny projections extending from the surface of intestinal cells. These finger-like protrusions greatly increase the surface area available for absorption and digestion processes to occur efficiently. This specialized adaptation allows for optimal nutrient uptake and ensures our bodies receive essential vitamins, minerals, and other vital substances from our diet. Another TEM image showcases Giardia lamblia, an intestinal parasite that attaches itself to these microvilli. The presence of this organism disrupts normal digestive functions and can lead to gastrointestinal symptoms such as diarrhea and malabsorption. A colored TEM image further highlights the beauty of these microscopic structures. The vibrant hues bring attention to their importance in maintaining proper gut health. Moving away from the intestines, we shift focus to another type of cell where similar structures are found - sperm cells. In scanning electron microscopy (SEM) images, sperm cells reveal their own unique brush border-like features on their surfaces. These elongated projections aid in motility and facilitate fertilization by increasing contact with surrounding fluids during reproductive processes. Overall, whether it's within our intestines or involved in reproduction, these brush borders or microvilli serve critical roles in various physiological functions within our bodies. Their intricate designs allow for efficient nutrient absorption or enhanced mobility depending on their location – truly highlighting nature's incredible adaptability at both macroscopic and microscopic levels.