URINARY SYSTEM OF MAN:-
The part of urinary system of man consist of following organs.
The part of urinary system of man consist of following organs.
1: KIDNEY:
Filter blood and removes waste in the form of urine.
2:URETER:
Transfer urine from urinary bladder.
Transfer urine from urinary bladder.
3:URETHRA:
Passes out from urinary bladder to external environment.
4:URINARY BLADDER:
Stores urine until urine is out from body.
1:KIDNEYS:-
°Location:
Two kidneys are located above the waist on either sides of vertebral columns with posterior wall of abdomen.
°Location:
Two kidneys are located above the waist on either sides of vertebral columns with posterior wall of abdomen.
°Protection:
Kidneys are covered by membraneous perifoneum.
Kidneys are covered by membraneous perifoneum.
°Morphology:
Kidneys are bean shaped organs. Its concave side there is depression called "Hilus"
Kidneys are bean shaped organs. Its concave side there is depression called "Hilus"
°Anatomy:
"Internal structure of kidney"
"Internal structure of kidney"
The internal structure of kidney consist of following parts;
°Capsule:
Fibrous capsule, which protect kidney.
Fibrous capsule, which protect kidney.
°Cortex:
Outer region of kidney,contain upper parts of nephron .Brownish region also.
Outer region of kidney,contain upper parts of nephron .Brownish region also.
°Medula:
Inner region of kidney contain lower parts . It is the central pale yellow region. Medullary pyramids are also present in medula.
Inner region of kidney contain lower parts . It is the central pale yellow region. Medullary pyramids are also present in medula.
°Pyramids:
These are the cone like structures present in Medula . Urine is dropped in pelvis from conical part of pyramids.
These are the cone like structures present in Medula . Urine is dropped in pelvis from conical part of pyramids.
NEPHRON:-
°Each nephron is the structure and functional unit of kidney.
°Each human kidney contains almost one million nephron.
FUNCTIONS :-
°Nephron filter blood and removes the wastes in the form of urine.
°Nephron performs both Osmoregulation as well as excretion.
" Nephron is a long convoluted tubule composed of following structures"
PARTS OF NEPHRON:-
Two main parts of neuron are:-
Malphighian Body:-
a) Bowman's Capsule:-
Malphighian body is composed of double walled cup like structure called
" Bowman's Capsule "
" Bowman's Capsule "
b) Glomerules :-
Afferent and efferent vessels forms a tuft in bowman's capsule called
" Glomerules "
" Glomerules "
Both the Glomerules and Bowman's together form Malphighian body.
.FUNCTION:-
It serves as filtration unit of the nephron.
•RENAL TUBULES:-
°Proximal convulated tubule:-
The Bowman's Capsule gives out coiled tubule known as "Proximal convulated tubule".
The Bowman's Capsule gives out coiled tubule known as "Proximal convulated tubule".
° lOOP OF HENLE:-
Each nephron makes a U-shaped structure called " loop of Henle".
Each nephron makes a U-shaped structure called " loop of Henle".
° VASA RECTA:-
Peritubular capillaries of renal arteries and renal vein form a network called "Vasa recta" which runs straight parallel besides limbs of loop of henle.
Peritubular capillaries of renal arteries and renal vein form a network called "Vasa recta" which runs straight parallel besides limbs of loop of henle.
° Distil convulated tubule:-
The ascending limb of the loop of Henle become larger in diameter in cortex and forms a coil called " Distil convulated tubule ".
The ascending limb of the loop of Henle become larger in diameter in cortex and forms a coil called " Distil convulated tubule ".
° Collecting Duct:-
The distal end finally opens into collecting duct. The collecting duct receives urin from numbers of nephron and drain it into pelvis.
The distal end finally opens into collecting duct. The collecting duct receives urin from numbers of nephron and drain it into pelvis.
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