Minor Calyx Flashcards

Review the minor renal calyces, their relationship to renal papillae, collecting system anatomy, and urinary drainage.

Card 1 of 18Question

What is a minor renal calyx?

A cup-shaped structure that receives urine from a renal papilla.

In This Section

1. What is a minor renal calyx?

A cup-shaped structure that receives urine from a renal papilla.

2. Where are the minor calyces located within the kidney?

Within the renal sinus, surrounding the tips of renal pyramids.

3. Which anatomical structure projects into a minor calyx?

The renal papilla.

4. Which ducts discharge urine into a minor calyx?

The papillary ducts, also called ducts of Bellini.

5. Through which openings does urine enter a minor calyx?

The papillary duct openings at the area cribrosa.

6. What is the area cribrosa of the renal papilla?

A perforated region at the papillary tip containing the openings of papillary ducts.

7. Into which structure do minor calyces typically drain?

A major renal calyx.

8. How many minor calyces are typically present in one human kidney?

Approximately 7 to 14, although the number varies.

9. What type of epithelium lines the minor calyces?

Transitional epithelium, also called urothelium.

10. What is the main functional advantage of the urothelial lining?

It provides a distensible, urine-impermeable protective barrier.

11. What is the calyceal fornix?

The arched recess where a minor calyx surrounds the base of a renal papilla.

12. What is the relationship between a minor calyx and a compound renal papilla?

A single minor calyx may receive urine from a compound papilla formed by fused pyramids.

13. Which tissue layer lies immediately beneath the urothelium of a minor calyx?

The connective tissue lamina propria.

14. What role does smooth muscle play in the walls of minor calyces?

Its contractions help propel urine toward the larger collecting passages.

15. Which condition can develop when mineral deposits form within a minor calyx?

Calyceal nephrolithiasis, involving urinary stones within the calyx.

16. What is a calyceal diverticulum?

A urothelium-lined cavity within the renal parenchyma that communicates with a calyx through a narrow channel.

17. What can happen to a minor calyx when urinary outflow is obstructed?

It may become dilated, producing caliectasis.

18. What is forniceal rupture in the renal collecting system?

A tear at a calyceal fornix that allows urine to leak outside the collecting system.