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.
MYTHS ABOUT HEMORRHOIDS: 1  All bumps around the anus which cause pain and bleeding are hemorrhoids. 2  Laser hemorrhoidectomy hurts less than cold scalpel hemorrhoidectomy. 3  Hemorrhoids are hereditary (donât forget we are all born with hemorrhoids)  All hemorrhoids require surgery to treat the problem.