An important enzyme, renin, is also produced in the kidneys; it acts in negative feedback. Located at the rear of the abdominal cavity in the retroperitoneal space, the kidneys receive blood from the paired renal arteries, and drain into the paired renal veins. Each kidney excretes urine into a ureter which empties into the bladder.
2. skank-a rhythmic dance to reggae music performed by bending forward and extending the hands while bending the knees. dancing, terpsichore, dance, saltation-taking a series of rhythmical steps (and movements) in time to music.
It is established in common dialect (Scottish-proper English) that a user is someone who uses another person to serve themselves heedlessly. Simply using the word user might be straightforward enough! A word which springs to mind for me, due to my locale, is a skag-also someone who uses another person. Opportunist/parasite/freeloader. Interestingly (some might say), skag also means Heroin.