How go the urinary mechanism work?

The body takes nutrients from food and changes them to energy. After the body has actually taken the food materials that it needs, waste products are left behind in the bowel and also in the blood.

The kidney and urinary systems help the body to remove liquid waste called urea. They also aid tokeep chemicals (such together potassium and also sodium) and water in balance. Urea is created when foods items containing protein (such together meat, poultry, and particular vegetables) are broken down in the body. Urea is carried in the blood to the kidneys. This is whereby it is removed, together with water and also other wastes in the type of urine.

The kidneys have actually other necessary functions. They manage blood pressure and produce the hormone erythropoietin. This hormone controls red blood cell manufacturing in the bone marrow. The kidneys also control the acid-base balance and conserve fluids.


*

Kidney and urinary system parts and also their functions

Two kidneys. This pair the purplish-brown organsis located below the ribs towards the middle of the back. Their role is to:

Remove garbage products and medicines native the body

Balance the body"s fluids

Balance a selection of electrolytes

Release hormones to regulate blood pressure

Release a hormone to control red blood cell manufacturing

Help with bone health by managing calcium and also phosphorus

The kidneys eliminate urea from the blood through tiny filtering units called nephrons. Each nephron consists of a ball created of little blood capillaries (glomerulus) and a little tube dubbed a renal tubule. Urea, along with water and other waste substances, creates the urine together it passes with the nephrons and also down the renal tubules the the kidney.

Two ureters.

You are watching: The elimination of waste is the primary function of the __________.

These small tubescarry urine from the kidney to the bladder. Muscles in the ureter walls keep tightening and also relaxing. This pressures urine downward, far from the kidneys. If urine backs up, or is permitted to was standing still, a kidney infection have the right to develop. About every 10 come 15 seconds, little amounts of pee are emptied into the bladder native the ureters.

Bladder.This triangle-shaped, hollow body organ is situated in the lower belly. That is organized in ar by ligaments that are attached to various other organs and also the pelvic bones. The bladder"s wall surfaces relax and expand to keep urine. Castle contract and also flatten to north urine v the urethra. The usual healthy adult bladder can store as much as 2 cup of urine because that 2 to 5 hours.

Two sphincter muscles.These one muscleshelp save urine indigenous leaking by closing tightly choose a rubber band about the opening of the bladder.

Nerves in the bladder.

See more: Declassified: What Was The Western Bloc Was Made Up Of, Us History Semester 2 Quiz 2

The nerves alert a human being when the is time to urinate, or north the bladder.

Urethra.This tube allows urine to pass exterior the body. The brain signals the bladder muscle to tighten. This squeezes urine out of the bladder. In ~ the very same time, the mind signals the sphincter muscles to relax to let urine exit the bladder v the urethra. As soon as all the signals take place in the exactly order, regular urination happens.

Facts about urine

Normal, healthy urine is a pale straw or clean yellow color.