Excretory System is the biological process in which the body removes harmful metabolic compounds.
Excretory System in Various Animals
- The excretory organ in earthworms and other annelids is kidney. These animals emit nitrogenous wastes.
- The cockroach has an excretory organ named Melpigi ducts. It emits nitrogen waste.
- Crustacean animals such as shrimp have horny glands or green glands present as excretory organs.
Human Excretory System
An important part of the human excretory system is the kidney, a urinary duct, a bladder, and a urethra.
- It weighs about 120 to 170 grams. It is shaped like an apple seed. Its color is dark brown-red.Advertisement
- In the kidney, nitrogenous taboos such as urea or uric acid are separated from the blood.
- The kidney has a cluster of very thin mural blood cells. Each cell in the kidney is inside the cup-shaped end of a tube. This tube collects filtered urine. Each group has many filtration units known as vascular nephrons. The nephron is the functional unit of the Kidney.
- The urine produced in each kidney enters a long tube, the ureter, which connects the kidney to the bladder.