Urinary bladder and male internal genetalia Flashcards
How is the bladder related to the peritoneum
Lies in extraperitoneal fat
Where is the badder in adults vs. infants
Adults - lesser pelvis
Inflants = abdomen
What is the shape of the bladder
Tetrahedral
What are the different parts of the bladder
Apex Body Fundus/base Neck Uvula - trigone projections
What are the surfaces of the bladder
Superior
Inferolateral
Posterior
What makes up the trigone of the bladder
Two ureteric openings
Internal urethral opening
What is characteristic of the histological structure of the trigone of the bladder
Mucosa is smooth
What are the characterists of the bladder wall
Made of detrusor muscle (Smooth Muscle)
Neck contains the Internal spincter
At the opening of the ureter - there is no backflow of urine
- efficient sphincter
- angle
Mucosa is folded into rugae
Vesical (bladder) fascia is made of Loose CT
What are the relations of the bladder
Superior:
- peritoneum
- Ileum
- sigmoid colon
Inferolateral
- Obturator internus muscle
- Superior vesical artery and vein
- Levator Ani muscle
- Obturator nerve, artery and vein
Anterior:
- Retropubic space
- Pubic crest
Posterior (male):
- seminal vesicles
- ampulla of ductus deferens
- retrovesical pouch
- ampulla of rectum
Inferior (male)
-prostate gland
Posterior (female):
- anterior wall of vagina
- cervix
Posteriosuperior (female)
- uterovesical pouch
- body of uterus
Please like some old sucker’s leggings.
On roads, people seem adiment about reversing.
Allow people’s children unwarmed bread.
What is the arterial supply of the bladder
Superior Vesical Aa. (from Umbilical A.)
-Supplies Anterosuperior Part
Uretral Branches (from Superior Vesical Aa.)
Inferior Vesical A. / Vaginal A.
Prostatic Branches (from Inferior Vesical A. - Males Only)
LOOK AT SCHEMATIC PICTURE IN LECTURE SLIDES
What is the venous drainage of the bladder
Vesical venous plexus (into Int. Iliac Plexus)
Males - Prostatic Plexus
Females - Uterovaginal Plexus
What is the lymphatic drainage of the bladder
Superior:
-Ext. Iliac LN
Fundus:
-Int. Iliac LN
Neck/Urethra:
- Sacral LN
- Common Iliac LN
What is the innervation of the bladder
Parasympathetic:
- Inferior Hypogastric Plexus
- Contracts detrusor muscle
- Relaxes internal sphincter
Sympathetic:
- T11-T12
LOOK AT SCHEMATIC PICTURE IN LECTURE SLIDES
What are the four parts of the Urethra
Preprostatic (bladder neck)
Prostatic
Membranous
Spongy
These parts are found only in males
How long is the Preprostatic part of the Urethra (Males)
1-1.5cm
Describe the GENERAL structure of the Prostatic part of the Urethra. (Males)
3-4cm long
Most dilatable
Widest
Posterior wall internally
What are the structures that are found in the Prostatic part of the Urethra (Males)
Urethral crest
NBProstatic sinus - ductules of the gland
Seminal Colliculus (opening)
NBProstatic Utricle (uterine primodium)
Ejactulatory ducts into utricle (or adjacent it)
What is the general structure of the urethra in females?
4cm
Anterior to vagina
Traverses the pelvic diaphragm
Contains paraurethral glands
Opens into vestibule
In males, how long is the Ductus Deferens
20-25cm long
What are the attachments of the Ductus Deferens
- Tail of epididymis
- Ejaculatory duct
Ampulla:
- Near Ejaculatory Duct –> into Prostatic Urethra
- Connects Ductus Deferns with Seminal Vesicle duct
What is the arterial supply of the Ductus deferens
Deferential A.
How long are the seminal vesicles
5cm
What are the relations of the seminal vesicles
Rectum lies behind
What is the blood supply of the seminal vesicles
Inferior Vesical A
Middle Rectal A.
Explain the formation, ending and structure of the Ejactulatory Ducts
Formed from union of Ductus Deferens with Duct of Seminal Vesicle
Converge and open on seminal colliculus (on prostatic utricle)
2,5cm
What is the blood supply and venous drainage of the Ejaculatory ducts
Arterial supply:
Deferential Aa.
Venous drainage:
- Prostatic plexus
- Vesical Plexus
What are the relations of the Prostate Gland?
Directly behind inferior edge of pubic symphysis
What is the lobular composition of the Prostate Gland
Two lateral lobes
Anterior lobe (isthmus): -connecting lateral lobes anteriorly
Posterior lobe:
- below ejaculatory ducts
- posterior to urethra
Middle lobe:
-Between urethra and ejaculatory ducts
How much of the semen does the prostate gland produce?
20%
Where does the duct of the prostate gland open?
Prostatic sinus
What is the arterial supply of the Prostate gland
Prostatic arteries (from inferior vesical a.)
Where are the bulbourethral glands
Lie in external urethral sphincter
Opens into spongy urethra
When does the bulbourethral gland secrete
During sexual arousal
What are the clincal implications of the bladder
Damaged with pelvic fractures
Problems with micturation (discharge of urine) usually due to cancers
What are the clinical implications with the male internal genetalia
Problems with ejaculation
Prostatic Carcinomas and Benign Tumours thereof
