Mechanical sex pissing

When the bladder is fully distended the superficial cells become squamous (flat) and the stratification of the cuboidal cells is reduced in order to provide lateral stretching.The physiology of micturition and the physiologic basis of its disorders are subjects about which there is much confusion, especially at the supraspinal level.

Mechanical sex pissing

In some animals, in addition to expelling waste material, urination can mark territory or express submissiveness.

Physiologically, urination involves coordination between the central, autonomic, and somatic nervous systems.

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Part of the urethra is surrounded by the male or female external urethral sphincter, which is innervated by the somatic pudendal nerve originating in the cord, in an area termed Onuf's nucleus.

Smooth muscle bundles pass on either side of the urethra, and these fibers are sometimes called the internal urethral sphincter, although they do not encircle the urethra.

Brain centers that regulate urination include the pontine micturition center, periaqueductal gray, and the cerebral cortex.

In placental mammals, urine is ejected through the penis in males The main organs involved in urination are the urinary bladder and the urethra.

It is commonly believed that in infants, voiding occurs involuntarily (as a reflex).

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