the papillary ducts in the renal medulla lead to a renal
Papillary duct Medullary collecting ducts converge to form a central (papillary) duct near the apex of each renal pyramid. This "papillary duct" exits the renal pyramid at the renal papillae. The renal filtrate it carries drains into a minor calyx as urine.[2]
Alonso Álvarez de Pineda
My Ántonia
Rate equation k is the first order rate constant, which has units of 1/s or sâˆ’1.