straight tubule

straight tu·bule

one of the straight tubules of the kidney, present in the medulla and pars radiata of the cortex.
References in periodicals archive ?
It connects to the proximal straight tubule, which begins in the cortical layer and joins the descending limb of the loop of Henle in the outer medullary layer.
The [K.sup.+] reabsorbed in the medullary segment of the tubule is the source of the [K.sup.+] secreted into the proximal straight tubule and descending loop of Henle.