USMLE Step 1 Renal Physiology 1 Review 58 04 Gross Structure of the Kidney

USMLE Step 1 Renal Physiology 1 Review 58 04 Gross Structure of the Kidney

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Play USMLE Audio MP3 58 04 Gross Structure of the Kidney Below

Begin 58 04 Gross Structure of the Kidney Transcription

Now let’s talk about kidney structure.

Where are the kidneys located?

  • The kidneys are located in the back of the upper abdomen below the diaphragm and liver.

About how big is each kidney?

  • About the size of a fist.

Name the two regions of the kidney. They start with C and M.

  • The two regions of the kidney are the cortex and the medulla.

What are the cone-shaped segments of the renal medulla called? They start with RP.

  • The renal pyramids are the cone-shaped segments of the renal medulla.

What is the apex of the renal pyramid called? It starts with P.

  • The apex of the renal pyramid is called a papilla or renal papilla.

What structures convey urine from the medullary collecting ducts to the minor calyces at the tips of the papillae? The answer starts with DOB.

  • The ducts of Bellini convey urine from the medullary collecting ducts to the minor calyces.

What is another name for the ducts of Bellini? The answer starts with PD.

  • Papillary ducts.

What area occurs at the tip of a renal papilla and is comprised of the openings of the ten to 25 papillary ducts that converge at each renal papilla?

  • It starts with CA. The cribriform area.

What does cribriform mean?

  •  With many perforations, like a sieve.

Into what structures does the urine drain from the minor calyces? They start with MC.

  • From the minor calyces the urine drains into the major calyces. From the calyces the urine flows into the funnel shaped passageway at the core of the kidney.

What is this passageway called? It starts with RP.

  • From the calyces urine drains into the renal pelvis.

And then, where does it go?

  • Into the ureter.

And finally, to what structure does the ureter convey the urine? It starts with UB.

  • The ureter conveys the urine to the urinary bladder.

Student doctor please pause the tape and summarize what we’ve discussed about the gross structure of the kidney.

The kidneys are located in the back of the upper abdomen below the diaphragm and liver. Each one is about the size of a fist. The two regions of the kidney are the cortex and the medulla. The renal pyramids are the cone-shaped segments of the renal medulla. The apex of a renal pyramid is called a papilla. The ducts of Bellini or the papillary ducts convey urine from the medullary collecting ducts to the minor calyces at the tips of the papillae. The cribriform area is at the tip of a renal papilla and is comprised of the openings of ten to 25 papillary ducts that converge at each papilla. Cribriform means with many perforations, like a sieve. From the minor calyces the urine drains into the major calyces. After that, the urine flows into the renal pelvis which is the funnel-shaped passageway at the core of the kidney. From there it flows into the ureter which conveys it to the urinary bladder.

 

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