phylum. 1  Biology. the primary subdivision of a taxonomic kingdom, grouping together all classes of organisms that have the same body plan. 2  Linguistics. a category consisting of language stocks that, because of cognates in vocabulary, are considered likely to be related by common origin. Compare stock (def 13).
There are between 500 and 600 lymph nodes in the average adult human body.
The human body contains lymph nodes throughout, primarily in the head and neck, but also under the arms and in the groin. The lymphatic system consists of lymph nodes along with a number of organs and vessels. Continue Reading.