Push here to see the nephron structure
Push here to see a kidney
twisted tubes
prduction occurs in two phases
B)Tubular reabsorption
a lot of filtered substances go back into the blood in the surrounding capillaries (reabsorption zone) such as nutrients, water and minerals to keep their levels constant
- other substances in the proximal tubule
- water is reabsorbed in the loop of Henle
A) Glomerular filtration
blood that circulates in the glomerulus is filtered. Water and most solutes (with the exception of proteins)enter the Bowman´s capsule
The excretory system
Phisiology of urine system: Production of urine
Formed in the renal cortex and renal medulla/ drains into the pelvis
Urine = water + minerals + waste products (urea or uric acid)🡆they come from anmonia from the breaking down of proteins duct aminoacids
Nephron*
a few nephrons drain the urine in the same collecting duct which drains into the renal pelvis
Loop of Henle
Function: tubular reabsorption of water
u-shaped tube between proximal and distal
Function: tubular absorption of substances different from water
distal
proximal
function: glomerular filtration
it surrounds a curly-up capillary
a round sac
Functions
Regulates ph in blood
Regulates concentration and minerals in blood
Regulates water in tissues
Eliminates waste products
Constists of
Liver
Respiratory system
Sweat glands
Urinary system
made of
Urethra
Fuction
Micturition*: reflex that makes bladder contract and push the urine out
through it urine circulates when micturition* occurs
a conduit that connect bladder with the exterior. At its end there is an sphincter
Bladder
stores urine until reflex occurs(when it contains a large quality of urine
elastic sac
Ureters
collect the urine formed by the kidneys and conduit it to the bladder
two narrow tubes that come out from kidneys/start in the renal pelvis and end in bladder
Kidneys
Function
filter the blood from waste products
Functional unit
nephron*
Parts
Renal pelvis(hollow chamber)
Renal medulla(internal part)
Collecting ducts
Loop of Henle
Renal cortex(external part)
Convoluted tubules
Bowman´s capsule
Number
two
Shape
they are bean-shaped
Location
on both sides at the back of abdomen
