Palatine tonsil Anatomy. It is round to oval in shape and is actually a lump of lymphoid tissue. These tonsils are mainly constituted by mucus membranes, nerves, veins and tiny lumps of lymphoid tissue. These also comprise of small pits, or pockets lined by epithelium, also known as crypts.alatine tonsil Functions. This structure is mainly responsible for providing protection to the body from infection of the respiratory tract and the digestive system. It also assists the body in trapping bacteria, thus allowing the body the time to manufacture antibodies and destroy invading germs.