What is urinary bladder?
Urinary bladder is organ of urination. It plays an important rule in the excretion of wastes from our body. It is vital organ for the excretion of wastes. In the process of excretion following structures are involved as given below.
Pair of kidney
Pair of ureter
Urinary bladder
Urethra
Now we will discus the structure of each organs by one by one.
Pair of kidney
Our body posses the pair of kidney.The left kidney is uper and right kidney is lower than lift kidney. Our kidneys filter the blood and waste product is removed through urethra.
Pair of Ureter
Human body posses the pair of ureter. These are tubes which are connected to the kidneys and their ends are connected to the urinary bladder. They receive urine from kidney and transfer it to the urinary balladeer.
Urinary bladder
Human body posses a muscular organ called as urinary bladder. It stores urine temporary and then remove it through the urethra. Urinary balladeer is a hollow organ ureter takes urine and transfer it in to the urinary balladeer other wise it is a hollow organ. Urinary bladder is reservoir for the storage of the urine. The total urine storing capacity to store urine is about 600 ml at a time.But when 3 to 4 ml urine store urge start to urination. if urine is equal to 600 ml then urinary balladeer undergoes to involuntary control.
Location of urinary bladder
The position of the urinary bladder depend upon its emptiness or stored. If it is empty and relax then it is located in the pelvic cavity. And if it is filled with urine then it spread in to the abdomen.
Shape of urinary bladder
Its shape also depend upon the emptiness or stored if it is empty and their is not any urine in it then it looks like a bear. If it is fill with the urine then its shape is balloon like so its shape and location depend upon or vary according to the the emptiness or stored. Here some walls are present which are voluntary and involuntary for excretion of the waste urine.
There are followings structures in the human urinary balladeer.
Trig one
Trig one is a structure formed by the orifices present in the urinary bladder. The two orifices are located in the lower of ureter and one orifices located at the mouth opening of urethra. All these three orifices form a triangular shape called as trig one.
Walls of bladder
Bladder walls are composed three types of the tissues
from which these are prepared we will discus them by
one by one.
Outer layer
It is prepared by lose connective tissue and its uper side is covered by peritoneum. So uper layer is called as peritoneum.
Content
It posses blood vessels.
It posses nerves.
And also posses lymph.
Middle layer
Middle layer is made up of the muscles so it is called muscular layer and it is made up of the smooth muscles and elastic tissue. It is made by elastic muscle so it is called as ditreouses muscles. When we void (pass of urination) then this muscle contract and urine pass away out of the body. These muscles remain relax when ureter receive urine from kidneys and transfer it to the urinary balladeer. So it remain relax when urine is being filled in urinary balladeer.
In er layer mucous
The inner layer is made up of the mucous so it is called as mucous. This layer makes folds in its its inner side. These folds occur when urinary balladeer remains relax or when it is empty. When this is filled with urine then these folds disappears because when urine enter in this layer then these folds expend and fluid is stored in it.
Blood supply
Blood is supplied to the urinary balladeer through vesicle arteries.
