AP BIOLOGY

Detailed explanation-1: -A minor calyx surrounds the renal papillae of each pyramid and collects urine from that pyramid. Several minor calyces converge to form a major calyx. From the major calyces, the urine flows into the renal pelvis; and from there, it flows into the ureter.

Detailed explanation-2: -The center part of the kidney, the medulla (meh-DUH-luh), has fan-shaped structures called pyramids. These drain urine into cup-shaped tubes called calyxes (KAY-luh-seez). From the calyxes, pee travels out of the kidneys through the ureters (YUR-uh-ters) to be stored in the bladder (a muscular sac in the lower belly).

Detailed explanation-3: -Urine is made in the renal tubules and collects in the renal pelvis of each kidney. The urine flows from the kidneys through the ureters to the bladder. The urine is stored in the bladder until it leaves the body through the urethra.

Detailed explanation-4: -The ureters are tubes made of smooth muscle that propel urine from the kidneys to the urinary bladder.

Detailed explanation-5: -Renal collecting ducts are microscopic passages that connect to multiple nephrons. Tubular fluid passes through the collecting ducts to reach the calyces and renal pelvis.