*Anatomy - Renal Flashcards by Sophia White

7 essential functions of the kidneys?

Blood pH control
H2O balance
Electrolyte balance
Blood pressure control
Metabolism of waste products and drugs
Stimulates RBC production (due to hormone produced by kidney)
Required for absorption of calcium from the GI tract

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What are the 4 parts of the urinary tract?

Kidney
Ureter
Bladder
Urethra

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What epithelium are the tubes from the ureter to upper urethra lined with? Other name?

Transitional epithelium (also known as urothelium)

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What epithelium covers the distal urethra?

Protective stratified squamous mucosa

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What are the parts of the upper urinary tract?

the kidneys

The ureters

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Lower urinary tract?

Bladder

Urethra

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What 3 bodies regions is the urinary tract located in?

Abdomen
Pelvis
Perineum

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What ribs protect the kidneys?

11 and 12

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What type of fat protects the kidneys? (2)

Paranephric fat

Perenephric fat

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What kidney lies higher?

Why?

Left

Liver pushes down right kidney

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What is the tough fibrous layer surrounding the kidney called?

The renal capsule

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Why does the kidneys move with respiration?

The liver and spleen lie in contact with diaphragm superiorly and the superior poles of the kidneys inferiorly

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What vertebrae levels does the right and left kidneys lie alongside?

Right = L1-L3
Left = T12 - L2

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What are the 3 structures present in the renal hilum?

Right renal artery
Right renal vein
Right ureter

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What is more deep, the paranephric fat or perinephric fat?

Perinephric fat (separated from the paranephric fat by the renal (deep) fascia

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What provides arterial blood supply to the kidneys?

Renal arteries (branch bilaterally from the aorta)

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What provides arterial blood to the ureters?

Multiples arterial branches from the renal arteries, gonadal arteries and aorta

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What is the venous drainage from the kidneys?

Right and left renal vein which drain to the IVC

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Where does the left gonadal vein drain?

Where does the right gonadal vein drain?

Left trains into the left renal vein

Right drains into the IVC directly

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How many segments does each kidney have?

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What provides a blood supply to each of the 5 segments of the kidney?

The 5 segmental branches which arise from each renal artery

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What is the basic structural and functional units of the kidney?

Nephrons

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What are the 2 main anatomical parts of the kidney?

Outer cortex

Inner medulla

How many pyramids does the human medulla contain?

27 (each pyramid contains around 50,000 nephrons)

How are the nephrons arranged in the pyramids?

Regularly arranged, running axially towards the apex of each pyramid = striped appearance of pyramids

What is the first part of the nephron called? | What does this do?

The glomerulus | Ultrafiltration of the blood arriving via the branches of the renal artery

What is the next part of the nephron after the glomerulus?

Proximal convoluted tubules

What is the next part of the nephron after the proximal convoluted tubule?

Loose of henle

What is the next part of the nephron after the loop of henle?

Distal convoluted tubule

Where does the filtrate drain after the distal convoluted tubule?

The collecting duct

What is the purpose of the collecting duct?

Passes through the pyramid to drain the modified filtrate into the minor calyx as urine?

When is the filtrate from the nephron known as urine?

Once it passes into the minor calyx

Where does the urine drain to between the nephrons and the ureter?

collecting duct -> minor calyx -> major calyx -> renal pelvis -> ureter

The diameter of the urine drainage tubes increases, when is there a constriction?

At the pelvicureteric junction (the wider renal pelvis becomes the narrower ureter)

What are the 3 anatomical sites of ureteric constriction?

Pelviureteric junction As the ureter crosses the anterior aspect of the common iliac artery At the ureteric orifice (opening into posterior surface of the bladder)

What can renal calculi (stones) form from?

Urine calcium salts (can obstruct the urinary tract from within - usually visible on x-rays)

What does the urinary tract do when there is a ureteric obstruction?

As the ureter has smooth muscle in its walls, the urinary tract's response is therefore the same as the GI tracts - it increases peristalsis proximal tot he site of the obstruction in an attempt to flush it into the bladder (obstruction can either be internal or external)

What is the scientific name for peeing?

Micturation

Where is the trigone located?

On the floor of the bladder between the bilateral ureteric and midline urethral orifices

What type of epithelium lines the bladder?

The urothelium

What happens as the bladder fills?

The apex rises and the trigone does not stretch or move (helps to prevent the obstruction of the orifices)

What muscle is located within the walls of the bladder? Smooth/ skeletal? Purpose?

The detrusor Smooth Contracts ti void during micturition

What bladder sphincter is present in females? | Involuntary/ voluntary

Detrusor muscle fibres (encircle the ureteric orifices to prevent reflux of urine into the ureters during micturition Involuntary

what bladder sphincters are present in males? | Voluntary/ involuntary?

Detrusor muscle fibres encircle the ureteric orifices (like in females) Detrusor muscle fibres also encircle the bladder neck (this internal urethral sphincter prevents ejaculatory reflux - located within the bladder neck from detrusor muscle fibres circling it - only present in males Involuntary (both)

What is the part of the urethra that passes through the penis called?

The spongy urethra

Where is the external urethral sphincter present in males? Voluntary/ involuntary? Made from?

Inferior to the prostate gland Voluntary Skeletal muscle circularly arranged around the urethra

What conditions of the prostate can lead to urinary retention? How?

Benign or malignant enlargement of the prostate gland | By obstructing the prostatic urethra

Where can the apex of a full bladder reach?

The umbilical level

What are the 2 types of catheters that can be used to urinary retention?

Suprapubic catheter | Urinary catheter

Where is a suprapubic catheter inserted?

Into the bladder via the anterior abdominal wall

Where is a urinary catheter inserted?

Into the bladder via the urethra (inflated balloon "cuff" holds it int the bladder)

what is the name of the urethral sphincter present in females? Voluntary/ involuntary? Made up of?

External urethral sphincter Voluntary Skeletal muscle circularly arranged around urethra

Are males or females more likely to get UTIs?

Females(much easier to catheterise than males however)

What does an obstruction within the urinary tract cause?

Urine to "back up" in the tract toward the kidneys

If there is an obstruction within the urinary tract, when will urine produce stop?

When the pressure within he urinary tract exceeds the pressure favouring filtration at the glomerulus

What is renal failure/

failure to adequately filter the blood to produce urine