After infection of cattle, Dictyocaulus viviparus larvae reach the lungs via
The principle of core biological organization explains that structure-function relationships govern cellular processes. Hence Intestine, lymphatics, mesenteric lymph nodes, thoracic duct, heart, lungs fits best because it integrates fundamental principles, as documented in authoritative sources on general biology.
Ref: Campbell et al., Biology, 11th Edition, Chapter 2, Chemical Basis of Life, discusses fundamental biological principles and molecular organization providing broad foundation for life sciences understanding.
