A cross section of a bundle of nerve fibers. Axons (orange) are wrapped in myelin (purple); an extension of the membrane of glial cells. Myelin has high lipid content, and acts to insulate the axons, causing them to transmit nerve impulses much faster.
Systemic Enzymes: Understanding and Avoiding Thrombosis
Intestinal villi, finger-like projections that line-up the small intestine. They increase the surface area available for the absorption of nutrients from digested food. Magnification: when printed 10 centimetres wide.
The top layer of the epidermis is composed of flattened, dead skin cells that form the surface of the skin. The dead cells from this layer are continuously being shed and replaced by cells from the living epidermal layer below it (red)
MICROSCOPIC HAIRS IN INNER EAR: Inner ear help divers know their up down orientation in water. Sounds under water are magnified. When we hear sounds (whether under water or above) microscopic hairs in our inner ears vibrate.
Electron micrograph of a kidney glomerus. Glomeruli are part of the smallest functional unit of our kidneys. Inflammation of the glomerulus (responsible for filtration in the kidney) is called Glomerulonephritis.