1. Filtration- Excretory tubule collects filtrate, a solution of water, salt, sugars, amino acids, and nitrogenous wastes that can cross the membrane, from the blood.
2. Reabsorption- takes our useful molecules from the filtrate such as glucose, certain salts, vitamins, hormones, or amino acids by active transport.
3. Secretion- other toxins or excess ions are added to the contents in the excretory tubule
4. Excretion - all the contents, urine, leaves the body
2. Reabsorption- takes our useful molecules from the filtrate such as glucose, certain salts, vitamins, hormones, or amino acids by active transport.
3. Secretion- other toxins or excess ions are added to the contents in the excretory tubule
4. Excretion - all the contents, urine, leaves the body