lymphatic vessel vs lymphatic system

lymphatic vessel and lymphatic system both are nouns.

Word	Noun	Adjective	Verb	Adverb
lymphatic vessel	Yes	No	No	No
lymphatic system	Yes	No	No	No

lymphatic vessel (noun)	lymphatic system (noun)
a vascular duct that carries lymph which is eventually added to the venous blood circulation	the interconnected system of spaces and vessels between body tissues and organs by which lymph circulates throughout the body