Question

Urinary syatem parts and their information

Answer 1

Urinary system consists of a pair of ureter, urinary bladder, and urethra. Ureter are pair of whitish, narrow distensible and muscular tubes of 3ocm length.they open into urinary bladder .

Answer 2

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Kidney 

There are a pair of kidneys that are purplish-brown and are located below the ribs in the middle of the back. Their function is to:

Remove waste from the blood in the form of urineKeep substances stable in the bloodMake erythropoietin, a hormone which helps  make red  blood cellsMake vitamin D activeRegulate blood pressure

The kidneys remove waste from the blood through tiny filtering units called nephrons. Each nephron is made up  of a ball of small blood capillaries, called a glomerulus.  There is also a small tube called a renal tubule, which drains the urine and joins other tubules carrying the urine out of the kidney to the ureter.

Urea, together with water and other wastes, forms the urine.

Two Ureters

Each kidney has a narrow tube called a ureter, which carries urine from the kidney to the bladder. Muscles in the ureter walls tighten and relax forcing urine down this tube, away from the kidneys. If urine backs up, or stands still, a kidney infection can develop. About every 10 to 15 seconds, urine is emptied into the bladder from the ureters.

Bladder

The bladder is a triangle-shaped, hollow organ located in the lower abdomen. It is held in place by ligaments attached to the pelvic bones. The bladder's walls relax and expand to store urine, and contract and flatten to empty urine through the urethra.


Two Sphincter Muscles

Circular muscles that help keep urine from leaking by closing tightly like a rubber band around the opening of the bladder.

Nerves in urinary bladder

The nerves alert a person when it is time to urinate, or empty the bladder.

Urethra

The tube that allows urine to pass outside the body. The brain signals the bladder muscles to tighten, which squeezes urine out of the bladder. At the same time, the brain signals the sphincter muscles to relax to let urine exit the bladder through the urethra. When all the signals occur in the correct order, normal urination occurs.