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.
A hemorrhoid is referred to as thrombus if there is a clot form inside an external hemorrhoid. External hemorrhoid can rupture and cause bleeding. In internal hemorrhoids, symptoms are not noticeable until the hemorrhoids rupture and bleed. The bleeding of internal hemorrhoids is usually minimal. Things that Cause Internal Hemorrhoids to Rupture.