Urinary system presen.09
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Transcript of Urinary system presen.09
URINARY SYSTEM
by
Beatriz Bellini
FUNCTION
The urinary system, also called GU genitourinary
system, is responsible for maintaining a stable internal
environment for the body. It main function is to filter and
remove waste products from the blood. Resulting in the
production and excretion of urine from the body.
removes waste products
adjust water
adjust electrolyte levels
maintain the correct Ph level
ORGANS
KIDNEYS
Filters blood and produces urine
URETERS
Transport urine to the bladder
URETHRA
Transports urine to exterior
URINARY BLADDER
Stores urine
THE URINARY SYSTEM
Urine needs to be eliminated otherwise quickly become toxic to our organism, resulting in uremia.
The filtration of wastes from the blood takes place in the nephrons.
Millions of neuphrons make up each of out Kidneys, where the urine
Body Metabolic Process Production of waste product. (urine)
Its is one of the hardest working system of the body.
Each kidney drains urine and transports it to
the urinary bladder. Then, urine moves from
the bladder down the urethra to the outside
of the body.
KIDNEYS
The two kidneys are located in the lumbar region of the backabove the waist on either side of the vertebral column and in form of a bean shape.
Hilum is located at the center of the
kidneys, where the renal artery enters
and the renal vein leaves the kidney.
The renal artery delivers the blood that
is full of waste products to the kidney.
The renal vein returns the clean blood to
our general circulation.
INSIDE OF THE KIDNEY
The outer portion is called
cortex and the inner area
is called medulla.
Nephron is the functional
unit of the kidney.
Each nephron consist of
the renal corpuscle (blood
filtering portion) and the
renal tubule.
The reabsorption and
secretion stages of urine
production occur within
the renal tubule.
TUBULE IS DIVIDED IN 4 SECTIONS:
proximal convoluted tubule loop of Henle (nephron loop) distal convoluted tubule collecting tubule
Water and substances removed from bloodstream in
the renal corpuscle flow into the renal tubules to
finish the urine production process.
URETERS
The ureters are narrow tubes that lead from the kidneys to the bladder.
Urine enters the ureter after it drains out of the renal pelvis.
URINARY BLADDERIt is considered an elastic
muscular sac that lies in the
base of the pelvis just behind
the pubic symphysis.
Composed of three layers of
smooth muscle tissue lined with
mucous membrane containing
rugae, folds that allow it to
stretch.
The bladder receives the urine
directly from the ureters, stores
it and excretes it in form of
urine through the urethra.
Voluntary muscle action controls the external sphincter, which opens on demand to allow the intentional emptying of the bladder.
Involuntary muscle action causes the bladder to contract and the internal sphincter to relax.
URETHRAIt is a tubular canal that carries the flow of urine from the bladder to the outside of the body.
Urinary meatus is the external opening which urine passes out of the body.
The urethra is 1 ½ inches long in the female and 8 inches long in the male.
The male urethra has two functions, such as an outlet for urine and the passage-way for semen to leave the body.
ROLE OF KIDNEYS - HOMEOTASIS
The kidneys are responsible for homeostasis or balance in your body.
Maintain the body proper balance of water, chemicals, electrolytes and maintain the correct pH range with the body.
If the body is low in water, the kidneys conserve it. If there is excesses of water in the body, the body will excrete it.
STAGES OF URINE PRODUCTION
All wastes and unnecessary substances are removed from the bloodstream by the nephrons. However, urine is the final product of this entire process of waste elimination.
There are three stages of urine production: Filtration – The first stage is the filtering particles in the
renal corpuscle.
Reabsorption – After filtration, the filtrate passes through the four sections of the tubule. Most of the water, electrolytes and nutrients are reabsorbed.
Secretion – The final stage of urine production occurs when the special cells of the renal tubules secrete ammonia, uric acid, and other waste substances directly in to the renal tubule.
URINE IS A NORMALLY STRAW COLORED TO CLEAR AND STERILE
Adults bladder can hold 250 mL of urine.
COMPOSITION OF URINE:
I AM HYDRATED?URINE COLOR
CHART