The Excretory System. Excretion- removal of waste produced during body functions. Occurs through: Intestine - digestive wastes, salts Skin (sweat glands)- water, electrolytes Lungs - carbon dioxide, water Kidneys - toxins, water, N cmpds, electrolytes. Urinary System Functions.
The Excretory System
Why bother with all of these?
Not that type….
1. Cortex region of kidney
2. Medulla region of kidney
6. Most of the medulla is made up of RENAL PYRAMIDS with a base facing outward and papilla facing the hilus
7. Cortical tissue dips into the medulla between the pyramids, forming RENAL COLUMNS
8. Each renal papilla juts into a cup-like CALYX
9. The calyces join to form the renal pelvis. It narrows as it exits the hilum to become the ureter.
Renal artery brings ¼ of all blood to kidney/min.
Interlobar arteries- extend toward the cortex
Arcuate arteries- base of pyramids
Interlobular arteries- afferent arterioles that branch into the glomerulus where blood is filtered
Peritubular capillaries (vasa recta) Interlobular veinArcuate veinInterlobar veinrenal vein
Blood flows into
But, I am not going to test you on this stuff!
A. Capsule & hilus
B. Renal sinus
1. renal pelvis
2. major calyces
3. minor calyces
C. Renal medulla
1. renal pyramids
2. Renal column
D. Renal cortex
long, winding stem
1. renal corpuscle
3. loop of Henle
5. Collecting tubule & duct
RENAL CORPUSCLE- in the cortex
PROXIMAL TUBULE- in cortex
LOOP OF HENLE (LOH)
GFR is directly dependent on blood pressure.a. If GFR (BP) is too high, filtrate flows too fast and substances are NOT reabsorbed
urine flow increases water is lost blood volume drops blood pressure drops.
b. If GFR (BP) is too low, filtrate flows too slow and substancesare retained too much
urine flow decreases water is preserved blood volume increases blood pressure increases.
Addison's disease occurs when the adrenal glands do not produce enough of the hormone cortisol and, in some cases, the hormone aldosterone
the wall between a woman’s bladder and her vagina weakens and allows the bladder to droop into the vagina