Anatomy Unit 3 Flashcards
What artery primarily supplies all structures of the perineum?
Internal pudendal a. (branch of internal iliac)
*Travels with pudendal nerve
What is the innervation for the perineum?
Pudendal nerve from sacral plexus (S2-S4)
*Travels with internal pudendal artery
What connects the anus to the coccyx? (Part of anal triangle)
Anococcygeal raphe
Where is a potential spread of infection from the anal triangle to the urogenital triangle?
Ischioanal fossae
PPIII slide 10
What is the embryological derivative ABOVE the pectinate line? What type of innervation does it have? What is the arterial, venous, and lymph supply?
Endoderm derivative
Visceral innervation
IMA and portal system blood supply
Internal iliac lymph nodes
What is the embryological derivative BELOW the pectinate line? What type of innervation does it have? What is the arterial, venous, and lymph supply?
Ectoderm derivative
Somatic innervation
Iliac (caval) blood supply
Inguinal lymph nodes
Does sympathetic or parasympathetic innervation maintain contraction of the internal anal sphincter?
Sympathetic (parasympathetic inhibits contraction)
What innervates the external anal sphincter? Is it voluntary or involuntary?
Inferior anal branch; Voluntary
Is the glans penis comprised of corpus cavernosum or spongiosum tissue?
Corpus spongiosum
The _____ _____ ______ is the proximal aspect of the corpus cavernosum.
Crus of phallus
The _____ _____ _____ is the proximal aspect of the corpus spongiosum
Bulb of penis/vestibule
Name the order of the male urethra’s from the bladder to the external urethral orificie
- Intramural urethra (surrounded by internal urethral sphincter)
- Prostatic urethra
- Intermediate (membranous) urethra (surrounded by external urethral sphincter; passes through perineal membrane)
- Spongy (penile) urethra (surrounded by corpus spongiosum)
