Please enable JavaScript.
Coggle requires JavaScript to display documents.
Urinary System - Coggle Diagram
Urinary System
-
-
Urine
-
-
● Water , Na, K, NH3, Ca, Mg, Cl, PO4
● Waste product : urea , uric, creatinine
● Polyurea, Oligulia ,anuria
● Diuresis : drinking water, glucose, urea, caffeine, digitalis,diuretic
-
● Hematuria , pyuria, albuminuria, acetone bodies
Urine Formation
- At rest, about 20-25 % of cardiac output (CO) enters the kidneys.
- circulation through the kidneys (blood cells and plasma proteins follow the following pathway, while smaller substances will be filtered
-
●aorta → renal artery → interlobular arteries → afferent arterioles → glomeruli → efferent arterioles → peritubular capillaries → interlobular veins → renal vein → inferior vena cava.
-80% of all nephrons is located in the renal cortex and called cortical nephrons which contain shorter loops of henle (for less efficient water reabsorption)
-remaining 20% of nephrons is located between renal cortex and medulla and called juxtamedullary nephrons which contain longer loops of Henle (for efficient water reabsorption)
-
ท่อปัสสาวะ (urethra)
-
- Internal: involuntary sphincter of smooth muscle
- External: skeletal muscle inhibits urination voluntarily until proper time (levator ani muscle also helps voluntary constriction)
- Smooth muscle with inner mucosa Changes from transitional through stages to stratified squamous near end
-