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Urinary System Functions [4]
- 1. Regulate blood volume & pressure
- 2. Regulate plasma concentrations of ions
- 3. Stabilize blood pH
- 4. Conserve valuable nutrients
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Urinary System
Removes organic waste products
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Components of Urinary System [4]
- 1. Kidney
- 2. Ureter
- 3. Urinary Bladder
- 4. Urethra
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Position of kidney maintained by... [3]
- 1. Peritoneum
- 2. Adjacent organs
- 3. Supporting connective tissues
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Kidney is covered by...
Renal Capsule
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Hilum
Ureter exits, renal artery & nerve enter, renal vein exits
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Renal Sinus
Internal cavity within kidney
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Kidney is divided into an _________ _________ __________, and an _______ ________ ________.
- Outer renal cortex
- Inner renal medulla
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Medulla contains 6 to 18 _______ ________ _______.
Conical renal pyramids
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The tip of each pyramid called ______ ______ poject into the ______ ______.
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Bands of cortical tissue called ______ ______ extend towards the ______ _______ between adjacent ______ ______.
- Renal columns
- Renal sinus
- Renal pyramids
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Urine production begins in the ______ ______ in micorscopic tubular structures called ______.
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Renal Corpuscle consists of... [2]
- Glomerulus
- Bowman's Capsule
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To enter the capsular space a solute must be small enough to pass through... [3]
- 1. Pores of endothelial cells
- 2. Fibers of the basement membrane
- 3. Filtration slits between podocytes
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Filtration membrane is formed by... [3]
- 1. Fenestrated capillary
- 2. Basement membrane
- 3. Filtration slits
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Filtration membrane
- Prevents passage of blood cells & plasma proteins.
- Permits movement of water, metoblic wastes, ions, glucose, fatty acids, amino acids, vitamins.
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Solute concentration of interstial fluid ______ while tubular fluid ______.
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Water moves out of tubular fluid by ______ which ______ the volume of tubular fluid.
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Juxtaglomerular Apparatus
Secretes erythropoietin & renin
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Collecting system consists of ______ ______ and _______ ______.
- Collecting duct
- Papillary duct
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Collecting duct
Receives tubular fluid from nephrons
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Papillary duct
Delivers urine to a minor calyx
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Purpose of urine
Maintain homeostasis by regulating volue and composition of blood
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Urine Production involves 3 metoblic waste products...
- 1. Urea
- 2. Creatinine
- 3. Uric Acid
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Kidney Functions [3]
- 1. Filtration: BP forces water across renal corpuscle
- 2. Reabsorption: Removal of water & solute molecules from filtration & entry into peritubular capillaries
- 3. Secretion: Transport of solutes out of peritubular capillaries across tubular epithelium, into filtrate
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