BIO 242 chapter 27 part 1
what is the bulbospongiosus muscle for
ejaculation
what is the external end of the ejaculatory duct
enter urethra by 2 openings within the prostate
what is the sequence of the male duct system
epididymus, ductus deferens, ejaculatory duct, urethra
what kind of tissue and muscle is in the penis
erectile tissue with smooth muscle
when hot, the scrotum is...
flaccid and lower
What is at the distal end of corpus spongiosum
glans
What is the superior aspect of the testis
head of epididymis
where is the tunica vaginalis located?
inner layer of the abdominal wall
The corpus cavernousa branches from which artery
internal iliac artery
what does the ductus deferens do
joins the duct of seminal vesicle to form the ejaculatory duct
what secretes testosterone into the blood
leydig cells
Describe the temperature of the scrotum
lower than core body temperature for sperm production
what are two functions of the bulbourethral glands
lubricateing glands of corpus spongiosum secretion during sexual arousal
where is the ejaculatory duct located
mainly within the prostate
what are the three (4) functions of the epididymus
motility, storage of sperm cells, and expelling into ductus deferens during ejaculation (and provide nutrients)
what are the two functions of the prostate
nourish sperm and secretion during ejaculation
What are the three male reproductive glands
paired seminal glands (seminal vesicles prostate paired bulbo-urethral glands
the _________________ releases ____________ in smooth muscles of the artery
parasympathetic nervous system, nitric oxide
What is the tunica vaginalis derived from?
parietal peritoneum
where is the ductus defers located
passes through spermatic cord to pelvic cavity, between epididymus and ejaculatory duct
name four functions of the seminal glands
produce 70% of semen nourish sperm by fructose prolong lifespan of sperm by the alkaline secretion secretion during ejaculation
What is the exocrine function of the testis
produce sperm in to epididymus (seminiferous tubules)
what is the endocrine function of the testis
produce testosterone into blood (interstitial endocrine cells)
what encircles the urethra just inferior to the bladder
prostate
What forms the ejaculatory duct
seminal glands and ductus deferns
What is the internal end of the ejaculatory duct formed by
seminal vesicle and vas deferens
where is the epididymus located
between the testis and ductus deferens
What causes erection
blood congestion
why does blood never go into seminiferous tubules
blood-testis barrier
what is the posterolateral area of testis
body and tail of epididymus
what muscle surrounds the bulb
bulbospongiosus mucle
where are the bulbourethral glands located
close to the bulb of the corpus spongiosum
Describe the scrotum
contains paired testes
what is the ejaculatory duct's function
contribute to ejaculation of semen
which part of the penis is found on the dorsal side
corpus cavernosa
which part of the penis is the main erectile body
corpus cavernosa
What part of the penis does the urethra go through
corpus spongiosum
Which part of the penis is found on the ventral side
corpus spongiosum
which part of the penis expands to form glands anteriorly?
corpus spongiosum
what are sertoli cells made from
simple columnar epithelium
What all passes through the male urethra
sperm and urine (but not at the same time)
what produces gametes
sperm in the testes
what are germ cells made from
stratified epithelium
what does the tunica albunginea separate
testis interiorly into lobules (makes them white)
Where does the scrotum originate from?
the abdominal wall
What is at the proximal end of the corpus spongiosum
the bulb
what has an opening to the urethra
the prostate and bulbourethral glands
what is the spermatic cord homologous to in the female
the round ligament
What is the purpose of the male duct system
to carry sperm outside from testes
what is the fibrous capsule working as septa
tunica albuginea
where is the tunica albunginea located
under the vaginalis
what does the spermatic cord enclose
vas deferns, nerve fibers, blood vessels, and lymphatics that supply testis
when cold, the scrotum is...
wrinkled and higher
what is the spermatic cords origin
abdominal wall
the testes secrete this steroid sex hormone
androgens
What is the spermatic cord's inclusion
arteries and veins, lymphatic vessels, nerve fibers, and vas deferens
what are the bulbourethral glands homologous to in females
bartholins glands
What are the three parts of the penis
2 corpus cavernosa and 1 corpus spongiosum
What are at the end of the corpus cavernousa and anchor the penis to the pubic arch?
Crus (Crura)