Tuesday, May 24, 2011

The Urinary System

Excretion: It is a process by which the unwanted & end product of our body are removed from the body.
Excretory System includes: Urinary system, The Bowels, The skin, the Lungs, Saliva, Breast milk.

Urinary system: is the major excretory system. the Organs of Urinary System are –
1, Two Kidnneys- the major excretory organ.
2, Two Ureter- the tube which collect urine from kidney to Urinary Bladder.
3, One Urinary Bladder- the bladder which acts as a reservoir of urine.
4, Urethra- the small tube which expel urine from body to outside.




Urination Process: Urine is collected from Kidney to urinary bladder through ureter. Then expelled out by urethra.


Some common diseases of Urinary System:
1, Urethritis – Inflammation of urethra.
2, Cystitis – Inflammation of urinary bladder.
3, Pyelonephritis – Inflammation of pelvic & nephron.
4, Nephritis – Inflammarion of nephron (Kidney).
5, Renal failure – Total failure of the Kidney.



Nephron: is the structural & functional unit of kidney. It acts as a filter for blood.

Parts of Nephron: Each nephron consists of two parts –

1, Glomerulus – The network of blood capillaries contained within the Bowman’s capsule of nephron.

2, Renal tubule: parts of renal tubule are –
a, Bowmen’s Capsule
b, Proximal tubule
c, Loop of Henle
e, Distal tubule
f, Collecting t6ubule (duct)

 Loop of Henle

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