The bladder is a sac-like muscular organ, and its shape is related to whether it is filled with urine or not, showing a cone shape when it is empty and an ovoid shape when it is filled.
The main function of the bladder is to store urine. The wall of the bladder is divided into three main layers, namely the plasma layer, the muscular layer and the mucous layer, which have a certain degree of tolerance. The kidneys produce urine that is stored in the bladder, and when a certain amount is reached and urine is expelled, the bladder will be empty again. Therefore, the bladder shape and location are related to whether it is full of urine or not.
In adults, the bladder is usually located in the pelvis, and in the empty condition, it shows a vertebral shape. When filled with urine, the bladder enlarges and the base may exceed the upper edge of the pubic bone, appearing as an ovoid shape. When emptied of urine, the bladder emptiness shrinks. The infant bladder is located high up, usually in the abdomen.
It is important to protect the bladder and try to avoid bad behaviors such as holding urine. Frequent holding of urine may lead to bladder mucosal damage, which may easily induce cystitis, bladder stones and other lesions to occur.