How do the kidneys carry out the main function?

Answer 1

Liver is specialized excretory organ in vertebrates. Red blood cells that have reached their normal life span (in humans ca. 100 days) are sequestered from circulation and broken down; the porphyrin of the hemoglobin molecule is transformed by the liver to compounds known as bile pigments. These are excreted in the bile, discharged into the intestine, and finally eliminated with the feces. Thus, in addition to its many other functions, the liver is an excretory organ specialized for porphyrin excretion.

And moreover, urea is produced in the liver by ornithine- urea cycle. With this process liver helps in osmoregulation.

Answer 2

65% of water is reabsorbed in the proximal convoluted tubule of the nephron.

Answer 3

You need to read your book to find the answer.

Answer 4

your boob drops off lol