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Question
During its journey through the body, the juvenile Ascaris passes through
During its journey through the body, the juvenile Ascaris passes through
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Solution
The correct option is D Lungs
Man acquires infection by directly ingesting Ascaris eggs along with contaminated food or water. The second larva hatches out of the egg in the small intestine and penetrates the intestinal wall to enter the blood stream. Through the hepatic portal circulation, it is carried to the liver and then to the heart and is finally transported to the lungs via the pulmonary artery. Within the alveoli of lungs, the second larva molts to become the third larva and grows in size. After about a week, it molts to become fourthlarva that reaches pharynx through the trachea. From the pharynx, it is coughed up and swallowed to reach the intestine, where it molts to become an adult.
So, the correct answer is 'Lungs'.
Man acquires infection by directly ingesting Ascaris eggs along with contaminated food or water. The second larva hatches out of the egg in the small intestine and penetrates the intestinal wall to enter the blood stream. Through the hepatic portal circulation, it is carried to the liver and then to the heart and is finally transported to the lungs via the pulmonary artery. Within the alveoli of lungs, the second larva molts to become the third larva and grows in size. After about a week, it molts to become fourthlarva that reaches pharynx through the trachea. From the pharynx, it is coughed up and swallowed to reach the intestine, where it molts to become an adult.
So, the correct answer is 'Lungs'.
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