Formation of urine

Classified in Biology

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Special diets:

-Low cholesterol diet

-Low salt diet

-Gluten free diet

-Diabetes diet

-High or low calorie diets

Excretion:Is the process of

eliminating or expelling waste

matter from our bodys.

Excretion of CO2: Carbon

dioxide is produced during

cellular respiration and is

excreted from the body by

the lungs.

Wastes that are solids:The urine

and the sweat.

The urine:This is usually yellow

or transparent , but it can be

opaque when there is a lot of

waste. More or less the 95% is

water and the other 5% are

dissolved substances .The

composition is similar to blood

plasma .Urea is the primary

waste molecule in the urine .

Sweat:Is similar to urine but is

more dilute , approximately 99%


sweat glands.The tiny , tubular

structures within the skin expel

sweat through pores on the surface

of the skin .

The urinary system: Also stores the

urine until it is released from the body.


2.Renal vein(los mñqtos)

3.Renal artery

4.Ureters(pegao en cebolla)

5.Uretha(punta de la cebolla)


7.Renal pelvis


9.Blood vessels(la piel)


The two functions of the kidney:

They help to eliminate waste

molecules from the blood.

In this way the kidneys contribute

to the body's homeostasis , which

is the ongoing maintenance of

certain internal conditions.

How do the kidneys work?Healthy

kidneys filter about a half cup of

blood every minute , removing

wastes and extra water to make

urine .The urine flows from the

kidneys to the bladder through two

thin tubes of muscle called ureters ,

one of each side of your bladder.

Kidney function: 1.Blood entering the

kidneys moves through the capillary

networks where filtrations occurs.

2.Some of the molecules it contains

are reabsorbed by the nearby capillaries

.3.The result is the urine , which will be


The nephron :Is the longitudinal

section of the kidney.

Bowman´s capsule(ojo)

tubule(esta con los colores)

collecting ducts(el grande)


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