Which of the following is the role of the pulmonary artery?

a. The outer tissue layer consisting of renal corpuscles and convoluted tubules: This describes the renal cortex, not the renal pelvis.

b. The inner tissue layer consisting of the loop of Henle and collecting tubules: This describes the renal medulla, not the renal pelvis.

c. The expanded area of a renal tubule that encloses the glomerulus: This describes Bowman's capsule, not the renal pelvis.

d. The cavity where urine flows from the calyces to enter the ureters: Correct. The renal pelvis is the funnel-shaped cavity that collects urine from the calyces and channels it into the ureter.

a. Sebaceous: Sebaceous glands are located near hair follicles and produce sebum, an oily substance that lubricates the hair and skin, preventing dryness and keeping it supple.

b. Eccrine: Eccrine glands are sweat glands located throughout the skin and help regulate body temperature through sweating.

c. Ceruminous: Ceruminous glands are located in the ear canal and produce cerumen (earwax) which protects the inner ear from dust, debris, and insects.

d. Apocrine: Apocrine glands are sweat glands located in areas like the armpits and groin. They produce a thicker sweat that takes on an odor when broken down by bacteria.