Question

Hookworm holds the intestinal wall by means of

• A. Cutting plates
• B. Lancets
• C. Sucking action of pharynx
• D. Surface spicules

Answer 1

The correct option is B Lancets

Humans become infected with Hookworms when infective larvae in the soil penetrate the skin (usually the foot). Once through the skin, they enter the circulatory system and move through the veins to the heart and the lungs. In the lungs, they penetrate through the pulmonary alveolae, crawl up the bronchial tree to the pharynx and into the throat where they are then swallowed. They pass through the stomach unharmed and develop into adults in the small intestine. The adults attach to the intestinal wall with their well developed buccal capsule ( A pair of sub-ventral lancets or basal onchia are situated at the base of the buccal cavity and a dorsal tooth arises from the base of the buccal cavity and extends forwards to terminate just inside the mouth. A duct lies within this dorsal tooth and extends from the ampulla of the dorsal oesophageal gland at the base of the tooth to open on the dorsal side of the tooth just below its sharp tip. A pair of muscles extends from the dorsal surface of the esophagus to the base of the buccal capsule and are thought to bring about jerking movements of the head.).

So, the correct answer is 'Lancets'.