The phrase "constituent components" refers to the individual parts that make up a whole or larger entity. It means different elements that come together to form something. Full definition
«When you handle an explosive, the chemicals and various constituent components present, leave traces on your fingers and clothes, and are transmitted to anything you touch. (sciencedaily.com)
-- Yu Hong Yap, Malaysia Biodegradable plastic is defined as any form of plastic that can break down into its constituent components in the environment within days, weeks or months without leaving behind potentially toxic residue. (earthtalk.org)
Instead, Iraq has disintegrated into three constituent components: a pro-western Kurdistan in the north, an Iran - dominated Shiite entity in the south, and a chaotic Sunni Arab region in the center. (bookbrowse.com)