Final answer:
A catheter is a device used for urine drainage from the bladder through the urethra. The urethra facilitates the excretion of urine from the body. Urinalysis is a method to diagnose diseases through urine analysis.
Step-by-step explanation:
A device known as a catheter is inserted through the urethra and into the bladder for temporary or longer-term drainage of the urine. The urethra serves as a conduit that transports urine from the bladder to the outside environment. This process must be carefully managed to avoid infection and ensure proper functioning of the urinary system.
Urinary Bladder
The urinary bladder is a hollow, muscular organ positioned on the pelvic floor. It is responsible for collecting and storing urine from the kidneys until the time of elimination. When full or upon nervous system command, the bladder's detrusor muscle contracts to expel urine into the urethra, leading to urination.
Ureters and the Transport of Urine
The ureters are tube-like structures that propel urine from the kidneys to the bladder using peristaltic waves. They enter the bladder at an angle to create a one-way valve, preventing urine reflux.
Excretion of Urine
During excretion, urine travels through the ureters, is stored in the bladder, and then exits the body via the urethra. The urethra ends with external sphincters that control the release of urine during the process of urination, a system usually under conscious control.
The urinalysis is a diagnostic tool that involves the analysis of urine to detect diseases and assess the function of the urinary system.