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.
Bleeding Hemorrhoids and its Treatment. Commonly known as piles, hemorrhoids is to a condition in which the veins around the lower rectum and the anal canal swell. While enlarged veins inside the anal canal are called internal hemorrhoids, visible fleshy lumps protruding around the anus are called external hemorrhoid.