Penis: ligaments, skin, neurovascular Flashcards
what is the root of the penis supported by?
by two ligaments
what do the ligaments supporting the root of the penis attach to?
attach root of penis to the surrounding structures
what are the 2 ligaments supporting the root of the penis?
Suspensory ligament
Fundiform ligament
what is the suspensory ligament?
a condensation of deep fascia
what does the suspensory ligament connect?
It connects the erectile bodies of the penis to the pubic symphysis
what is the fundiform ligament?
a condensation of abdominal subcutaneous tissue
where does the fundiform ligament run from?
It runs down from the linea alba
what does the fundiform ligament surround?
surrounding the penis like a sling
where does the fundiform ligament attach to?
attaching to the pubic symphysis
what is significant about the skin of the penis?
more heavily pigmented than that of the rest of the body
what does the skin of the penis connect to? by?
It is connected to the underlying tunica albuginea by loose connective tissue
what is the prepuce?
(foreskin) is a double layer of skin and fascia
where is the prepuce located?
at the neck of the glans
what does the prepuce cover?
It covers the glans to a variable extent
what is the prepuce connected to?
connected to the skin of the glans by the frenulum
what is the frenulum? (connects prepuce to skin of glans)
a median fold of skin on the ventral surface of the penis
what is the preputial sac?
The potential space between the glans and prepuce
where does the penis receive its arterial supply from?
from three sources:
Dorsal arteries of the penis
Deep arteries of the penis
Bulbourethral artery
what are the arterial supply of the penis branches of?
internal pudendal artery
where does the internal pudendal artery arise from?
from the anterior division of the internal iliac artery
venus blood is drained from the penis by what?
two veins
what are the cavernous spaces drained by?
by the deep dorsal vein of the penis
what does the deep dorsal vein of the penis empty into?
into the prostatic venous plexus
what does the superficial dorsal veins supply?
the superficial structures of the penis, such as the skin and cutaneous tissues
what is the penis innervated by?
by S2-S4 spinal cord segments and spinal ganglia
what is sensory and sympathetic innervation to the skin and glans penis supplied by?
by the dorsal nerve of the penis
what is the dorsal nerve of the penis a branch of?
a branch of the pudendal nerve
what is parasympathetic innervation to the penis carried by?
by cavernous nerves
where is the cavernous nerves from?
from the prostatic nerve plexus
what are the cavernous nerves from the prostatic nerve plexus responsible for?
for the vascular changes which cause erection
