Question

Rhadbitiform larva performs extraintestinal migration through different organs in the body of mammals. Arrange them in the correct sequence.

(A) Liver (B) Hepatic portal vein
(C) Heart (D) Post caval vein
(E) Lungs (F) Pulmonary arteries
(G) Alveoli (H) Intestine

• A. D-A-B-E-F-C-H-G
• B. B-A-D-C-F-E-G-H
• C. E-F-A-C-B-D-G-H
• D. A-B-D-F-C-G-E-H

Answer 1

The correct option is B B-A-D-C-F-E-G-H

The rhabditiform larvae enters through the skin. They enter the hepatic portal vein (B) through which they move into the liver (A). The larvae moves to post caval vein (D). Through this vein, the larvae can enter the heart (C). The larvae then moves through the blood in the heart to the pulmonary arteries (F) which carries the larvae to the lungs (E). The larvae migrates to the alveolar sacs (G) in the lungs. They are carried by the bronchial tree to pharynx and are swallowed and moves to intestine (H). In the intestine, they develop to form the adult female.

Thus, the correct answer is option B.