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.
You have just as many lymph vessels and capillaries as you have blood vessels and capillaries! Lymph in the lymph vessels eventually reaches a lymph node -- there are about 100 nodes scattered throughout the body.