Describe the structure of human urinary system with diagram .

Explanation

Human Excretory System

The urinary system consists of the following:
1. Kidneys
2. Ureters 3. Urinary bladder 4. Urethra.
1. Kidneys. The kidneys are a pair of bean-shaped delicate organs. They are situated one on each side of the mid-dorsal line of the abdominal cavity, just below the level of the stomach.
2. Ureters. They are two tubes about 30 cm long, emerging from each kidney with the pelvis of which they are continuous. The ureters run downwards and inwards and open into the urinary bladder.
3. Urinary bladder. It serves as a reservoir for the urine. It is a hollow muscular organ lined by stratified epithelium. Its average capacity for storage is about 500 mm. It is situated in the cavity of the pelvis just behind the pubic symphysis.
4. Urethra. The urethra in two sexes differ. The male urethra is about 20 cm in length.
The female urethra is a short duct of about 4 cm long and its extends from the urinary bladder to the external urethra orifice which is in the vestibule just above and anterior to the vaginal orifice.