Renal Antomy Flashcards
When are the kidneys palatable
When enlarged
Very low body fat
Why is the right kidney lower than the left kidney
Liver
Where is the renal angle
Junction of 12th rib and lateral border of erector spinae
Kidney functions
Maintain fluid balance
Regulate and filter blood
Synthesis and release hormones
What organs are on anterior to the right kidney
Liver
Duodenum
R colic/hepatic flexture
What organs are anterior to the left kidney
Spleen
Stomach
Pancreas
L colic/splenic flexure
Small intestine
Hepatorenal recess
Potential space that separates the liver and right kidney
What potential space is between the liver and right kidney
Hepatorenal recess/ pouch of morison
Is the hepatorenal recess usually visible on ultrasound
No
What can collect in the hepatorenal recess
Fluid - when lying
What conditions make the hepatorenal recess very defined on ultrasound
Haemoperitoneum
Ascites
Pancreatitis
What structures are posterior to the kidneys
Branches of lumbar plexus
Muscles
What layer immediately covers the kidneys
Perinephric fat
What are the 2 layers of fat covering the kidneys
Perinephric fat
Paranephric fat
What separates the Perinephric fat and paranephric fat
Renal fascia
What is the outer part of the kidney
Fibrous Capsule
What 3 structures are in the kidney hilum
Renal pelvis
Renal artery
Renal vein
What is between the adrenal gland and kidney
Fat
What does the renal pelvis become
Ureter
Is the cortex or medulla lighter coloured
Cortex
What does fluid drain through to reach the renal pelvis
Renal papilla
What are the sections of the renal medulla called
Renal pyramids
Renal pyramids
Sections of kidney medulla
Renal columns
Areas of cortex that extend down between renal pyramids
What separates renal pyramids
Renal columns
What is the functional unit of the kidney
Nephron
What is the function of the glomerulus and nephron tubule
Glomerulus - filters blood
Tubule - returns needed substances to blood and removes waste
What do the interlobar arteries in the kidneys become
Arcuate arteries
How does blood travel from the interlobar arteries to interlobar veins
Interlobar art -> afferent arterioles -> glomerulus -> efferent arterioles -> vasa reacts -> interlobular veins
What does the renal artery branch into
Segmental arteries -> interlobar arteries
why is the left renal vein longer than the right renal vein
Has to cross over abdo aorta
What veins drain into the left renal vein
Left adrenal veins
Left Gonadal veins
Innervation of the kidneys
Renal plexus
What are the nerve roots of the renal plexus
T10-L2
Where is pain in the kidneys referred to
Flank/groin
Are the ureters intra or Retroperitoneal
Retro
How is movement of fluid from the bladder to the ureters prevented
One way flap valve as ureters enter bladder
Layers of the ureter wall
Transitional epithelium mucosa
Smooth muscle muscular is
Fibrous CT adventitia
What are the 3 constriction sites in the ureters
Uteropelvic junction
Pelvic inlet
Uterovesical junction
Where do the ureters pass over the pelvic brim
Bifurcation of common iliac arteries
Where do visceral afferents from the ureters enter the spinal cord
T11-L1/2
Which nerves cause referred pain in the loin from the kidneys
Ilioinguinal and iliohypogastric nerves
Which nerve causes referred pain from the kidneys in the groin
Genitofemoral nerve
How does pain location change as a kidney stone moves down the ureters
Loin to groin
Why does pain from a stone in the ureter come open waves
Peristalsis
Where is the bladder located in children
Abdomen
Is the bladder intra or Retroperitoneal
Retro
What part of the bladder does the urethra begin at
Base of bladder
3 layers of the bladder wall
Transitional epithelial mucosa
Thick muscular layer
Fibrous adventitia
What is the only fixed part of the bladder
Trigone
What structures are at the corners of the trigone
Urethra opening
Ureter openings
What controls flow of urine into the urethra
Sphincters
Which urethral sphincter is present in males and females
External urethral sphincter
Which urethral sphincter is only present in males
Internal urethral sphincter
Where is the external urethral sphincter
Surrounds urethra as it passes through urogenital diapragm
Where is the internal urethral sphincter
Bladder urethra junction in males
Which urethral sphincter is involuntary
Internal urethral sphincter
What does the internal urethral sphincter prevent
Retrograde ejaculation
3 parts of the male urethra
Prostatic
Membranous
Spongy
Micturition
Urination
What triggers urination
Distension of bladder walls
Which nerve innervates the external urethral sphincter
Pudendal nerve
Is urination caused by sympathetic or parasympathetic innervation
Parasympathetic
What 3 muscles are involved in urination
Detrusor muscle
Internal urethral sphincter
External urethral sphincter
How does parasympathetic innervation cause urination
Stimulates detrusor muscle to contract
Inhibits internal urethral sphincter
What type of innervation supplies the external urethral sphincter
Somatic