The Cauda equina is a bundle of nerve roots stemming from the lumbar enlargement and conus medullaris of the spinal cord. It was named after its resemblance to a horses tail by French anatomist, Andreas Lazarius, in the 17 century. The spinal roots considered to be part of the cauda equina are those that occupy the vertebral canal between vertebrae L2 to S5
A 2001 earthquake in Olympia, WA caused a sand pendulum to draw this floral design as a result of the high- and low-frequency waves that shook the shop it resided in. Beautiful result of a destructive moment.
A kidney uriniferous filtration tubule (nephron). The main filtering units in the kidney are called glomeruli. Filtered fluid passes into the specialized tubules seen here. Water and useful substances are absorbed, concentrating the fluid. The concentrated fluid passes to the bladder as urine. The tubules have two portions. The first is called the nephron, and is concerned with urine production. The second, called collecting tubules, carry out the final concentration of urine.
DID YOU KNOW
The World Health Organization estimates that 1/3 of the worlds population is infected with Mycobacterium tuberculosis, one strain of bacteria that causes the disease Tuberculosis? ONE THIRD! Thats around 2 billion people! Thats crazy!
However, in healthy individuals with strong immune systems the body does a good job combating the bacteria, so the bacteria never reproduces or becomes contagious. You never show symptoms either. Only about 5-10% of people with healthy immune systems develop symptoms.
Its when your immune system collapses that you become vulnerable (such as when you contract HIV).