Internal Organs+Glands · 82. Renal pelvis and ureter · Anatomy · MU Sofia

Internal Organs+Glands · 82. Renal pelvis and ureter.

Covers the renal pelvis as a funnel-shaped collecting structure in the renal sinus, its three shape types, and its division into minor and major calyces. Then describes the ureter's length, its four parts, and the constrictions where it crosses the iliac vessels. Also lists its arterial supply, innervation, the wall histology with transitional epithelium, and how peristalsis is generated.

Inside: 9 sections · 5 labelled pictures · 10 flashcards · 4 min

Topic 75 of 264 in the MU Sofia syllabus for Anatomy (Dental Medicine, Year 2). The free AceMed note covers it in 9 sections, about 513 words (4 min of reading), with 10 flashcards.

RENAL PELVIS

The renal pelvis is a funnel - shaped structure, that collects urine from the kidney and direct it into the uretres
Location : is situated in the renal sinus ( the central cavity of kidney )

Shapes :

a. Dendritic type

Extensive branching.
Very fine major calyces
narrow renal pelvis.

b. Transitinal form.
c. Ampullary type

Unclear major calyces
Wide renal pelvis
minor calyces arise directly from the renal pelvis.

Structure:

The renal pelvis is subdevided into cup-shaped structures know as calices (sg. calyx)
Each kidney has several minor calices that converge to form two or three major calices.

Renal papillae —Urine→ Minor calyces ⇉ Major calyces → Renal pelvis

URETER

There are 2 ureters, they are muscular tubes conveying the urine from the kidneys to the urinary bladder.
Dimensions:
25-30cm long, 3cm diameter (having constrictions in certain sites).

retroperitoneal

Constrictions

↙ very important for the exam!

5 Junction with the renal pelvis
6 Crossing the iliac vessels
– the right ureter runs ventrally to the external iliac artery and vein
– the left ureter runs ventrally to the common iliac artery and vein
7 Intramural part in the wall of the urinary bladder