腎上腺

Kidney; the organ that filters waste from the blood to produce urine; one of the body's main excretory organs.

Indicates direction or position, opposite of down; the surface or top of something; to go up; to attend class; previous; superior; to send up.

A gland, an organ that secretes a substance; includes exocrine glands like sweat glands and endocrine glands like adrenal glands.