ECOLOGY
EXCRETORY PRODUCTS AND THEIR ELIMINATION
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Detailed explanation-1: -The kidney is made up of three different regions internally: the outer cortex, the middle medulla (with the renal pyramids) and the inner-most renal pelvis.
Detailed explanation-2: -The outer, reddish region, next to the capsule, is the renal cortex. This surrounds a darker reddish-brown region called the renal medulla. The renal medulla consists of a series of renal pyramids, which appear striated because they contain straight tubular structures and blood vessels.
Detailed explanation-3: -The renal tubule can be divided into three major segments: the proximal tubule, including the proximal convoluted tubule and the proximal straight tubule (Fig. 4.3. 13B), the loop of Henle, including the thin descending and ascending limb and the thick ascending limb (Fig. 4.3.