Chitin is a primary component in the exoskeletons of arthropods and crustaceans and is also found in the cell walls of fungi. It's a polysaccharide, and it's excreted by the epidermal cells in arthropods.
Definition & Facts. Hemorrhoids, also called piles, are swollen and inflamed veins around your anus or in your lower rectum. External hemorrhoids form under the skin around the anus. Internal hemorrhoids form in the lining of the anus and lower rectum.
Hemorrhoids are swollen veins located around the anus or in the lower rectum. According to the American Society of Colon and Rectal Surgeons, millions of Americans suffer with hemorrhoids (ASCRS). There are two types of hemorrhoids, internal and external.ymptoms of hemorrhoids include: 1  extreme itching around the anus. 2  irritation and pain around the anus. 3  itchy lump located near your anus. 4  fecal leakage. 5  painful bowel movement. 6  blood on your tissue after having a bowel movement.