Pierre and Marie Curie are best known for their pioneering work in the study of radioactivity, which led to their discovery in 1898 of the elements radium and polonium. Marie Curie, b.
Its functions are vital to life and are regulated by the endocrine system by hormones such as antidiuretic hormone, aldosterone, and parathyroid hormone. In humans, a normal kidney contains 800,000 to 1.5 million nephrons.
Nephrons. Urine is produced in microscopic structures in the kidney called nephrons. Each kidney has many millions of nephrons. The glomerulus filters blood and produces glomerular filtrate. This filtrate contains water, glucose, salts and urea.