Download Ejaculatory duct

Figure 26.1 Reproductive organs of the male, sagittal view.
Ureter
Peritoneum
Seminal gland
(vesicle)
Ampulla of
ductus deferens
Ejaculatory duct
Rectum
Prostate
Bulbo-urethral gland
Anus
Bulb of penis
Ductus (vas) deferens
© 2014 Pearson Education, Inc.
Epididymis
Testis
Scrotum
Urinary bladder
Prostatic
urethra
Pubis
Intermediate
part of the
urethra
Urogenital
diaphragm
Corpus
cavernosum
Corpus
spongiosum
Spongy
urethra
Glans penis
Prepuce
(foreskin)
External
urethral orifice
Figure 26.10 Hormonal regulation of testicular function, the hypothalamic-pituitary-gonadal (HPG) axis.
1
GnRH
Anterior
pituitary
Via portal
blood
77
6
Inhibin
FSH
33
2
LH
4
Interstitial
endocrine
cells
Testosterone
Sustentocyte 5
Spermatogenic
cells
Seminiferous
tubule
© 2014 Pearson Education, Inc.
Stimulates
Inhibits
Somatic and
psychological
effects at other
body sites;
maintenance
of secondary sex
characteristics
Figure 26.2 Relationships of the testis to the scrotum and spermatic cord.
Urinary bladder
Superficial inguinal ring
(end of inguinal canal)
Spermatic cord
Penis
Septum of scrotum
Cremaster muscle
External spermatic
fascia
Superficial fascia
containing dartos
Scrotum
muscle
Skin
© 2014 Pearson Education, Inc.
Testicular artery
Ductus (vas)
deferens
Autonomic
nerve fibers
Pampiniform
venous plexus
Epididymis
Tunica vaginalis
(from peritoneum)
Tunica albuginea
of testis
Internal spermatic
fascia
Figure 26.3a Structure of the testis.
Spermatic cord
Blood vessels
and nerves
Ductus (vas)
deferens
Head of epididymis
Testis
Efferent ductule
Seminiferous
tubule
Rete testis
Lobule
Septum
Tunica albuginea
Straight tubule
Body of epididymis
Duct of epididymis
Tail of epididymis
© 2014 Pearson Education, Inc.
Tunica vaginalis
Cavity of
tunica vaginalis
Figure 26.5a Male reproductive structures.
Ureter
Urinary bladder
Ampulla of ductus deferens
Prostate
Prostatic urethra
Orifices of prostatic
ducts
Intermediate part
of the urethra
(membranous urethra)
Root of penis
Body (shaft)
of penis
Seminal gland
Ejaculatory duct
Bulbo-urethral gland and duct
Urogenital diaphragm
Bulb of penis
Crus of penis
Bulbo-urethral duct opening
Ductus deferens
Corpora cavernosa
Epididymis
Corpus spongiosum
Testis
Spongy urethra
Glans penis
Prepuce (foreskin)
External urethral orifice
© 2014 Pearson Education, Inc.
Figure 26.1 Reproductive organs of the male, sagittal view.
Ureter
Peritoneum
Seminal gland
(vesicle)
Ampulla of
ductus deferens
Ejaculatory duct
Rectum
Prostate
Bulbo-urethral gland
Anus
Bulb of penis
Ductus (vas) deferens
© 2014 Pearson Education, Inc.
Epididymis
Testis
Scrotum
Urinary bladder
Prostatic
urethra
Pubis
Intermediate
part of the
urethra
Urogenital
diaphragm
Corpus
cavernosum
Corpus
spongiosum
Spongy
urethra
Glans penis
Prepuce
(foreskin)
External
urethral orifice
Figure 26.2 Relationships of the testis to the scrotum and spermatic cord.
Urinary bladder
Superficial inguinal ring
(end of inguinal canal)
Spermatic cord
Penis
Septum of scrotum
Cremaster muscle
External spermatic
fascia
Superficial fascia
containing dartos
Scrotum
muscle
Skin
© 2014 Pearson Education, Inc.
Testicular artery
Ductus (vas)
deferens
Autonomic
nerve fibers
Pampiniform
venous plexus
Epididymis
Tunica vaginalis
(from peritoneum)
Tunica albuginea
of testis
Internal spermatic
fascia
Figure 26.5b Male reproductive structures.
Dorsal vessels
and nerves
Corpora cavernosa
Urethra
Skin
Tunica albuginea of
erectile bodies
Deep arteries
Corpus spongiosum
© 2014 Pearson Education, Inc.
Figure 26.2 Relationships of the testis to the scrotum and spermatic cord.
Urinary bladder
Superficial inguinal ring
(end of inguinal canal)
Spermatic cord
Penis
Septum of scrotum
Cremaster muscle
External spermatic
fascia
Superficial fascia
containing dartos
Scrotum
muscle
Skin
© 2014 Pearson Education, Inc.
Testicular artery
Ductus (vas)
deferens
Autonomic
nerve fibers
Pampiniform
venous plexus
Epididymis
Tunica vaginalis
(from peritoneum)
Tunica albuginea
of testis
Internal spermatic
fascia
Figure 26.9b Spermiogenesis: transformation of a spermatid into a functional sperm.
© 2014 Pearson Education, Inc.
Figure 26.9b Spermiogenesis: transformation of a spermatid into a functional sperm.
© 2014 Pearson Education, Inc.
Spermatogenesis
• Sperm (spermatozoa) production in seminiferous tubules
• Most body cells have 46 chromosomes - diploid chromosomal
number (2n)
– Two sets (23 pairs) of chromosomes
• One maternal, one paternal – homologous
chromosomes
– Gametes have 23 chromosomes - haploid chromosomal
number (n)
• Only one member of homologous pair
Figure 26.12 Internal organs of the female reproductive system, midsagittal section.
Peritoneum
Uterosacral
ligament
Perimetrium
Rectouterine
pouch
Rectum
Posterior fornix
Cervix
Anterior fornix
Vagina
Anus
Urogenital diaphragm
Greater vestibular
gland
© 2014 Pearson Education, Inc.
Suspensory
ligament
of ovary
Infundibulum
Uterine tube
Ovary
Fimbriae
Uterus
Round ligament
Vesicouterine
pouch
Urinary bladder
Pubic symphysis
Mons pubis
Urethra
Clitoris
External urethral
orifice
Hymen
Labium minus
Labium majus
Figure 26.14 Internal reproductive organs of a female, posterior view.
Suspensory
ligament of ovary
Ovarian
blood
vessels
Broad ligament
• Mesosalpinx
• Mesovarium
• Mesometrium
Uterine (fallopian) tube
Ovarian
ligament
Body of uterus
Ureter
Uterine blood vessels
Isthmus
Uterosacral ligament
Cardinal (lateral cervical)
ligament
Lateral fornix
Cervix
© 2014 Pearson Education, Inc.
Fundus
Lumen (cavity)
of uterus
of uterus
Ovary
Uterine tube
• Ampulla
• Isthmus
• Infundibulum
• Fimbriae
Round ligament of uterus
Wall of uterus
• Endometrium
• Myometrium
• Perimetrium
• Internal os
• Cervical canal
• External os
Vagina
Figure 26.13 Photomicrograph of a mammalian ovary showing follicles in different developmental phases.
Germinal
epithelium
Tunica
albuginea
Cortex
Medulla
Primary
follicles
Secondary
follicle
Antrum of a vesicular
(antral) follicle
© 2014 Pearson Education, Inc.
Figure 26.14 Internal reproductive organs of a female, posterior view.
Suspensory
ligament of ovary
Ovarian
blood
vessels
Broad ligament
• Mesosalpinx
• Mesovarium
• Mesometrium
Uterine (fallopian) tube
Ovarian
ligament
Body of uterus
Ureter
Uterine blood vessels
Isthmus
Uterosacral ligament
Cardinal (lateral cervical)
ligament
Lateral fornix
Cervix
© 2014 Pearson Education, Inc.
Fundus
Lumen (cavity)
of uterus
of uterus
Ovary
Uterine tube
• Ampulla
• Isthmus
• Infundibulum
• Fimbriae
Round ligament of uterus
Wall of uterus
• Endometrium
• Myometrium
• Perimetrium
• Internal os
• Cervical canal
• External os
Vagina
Figure 26.16a The external genitalia (vulva) of the female.
Mons
pubis
Prepuce
of clitoris
Clitoris
(glans)
Vestibule
Labia
majora
Labia
minora
External
urethral
orifice
Hymen
(ruptured)
Anus
Vaginal
orifice
Opening of the duct
of the greater
vestibular gland
© 2014 Pearson Education, Inc.
Figure 26.16b The external genitalia (vulva) of the female.
Clitoris
Labia minora
Labia majora
Anus
Inferior
ramus
of pubis
Pubic symphysis
Body of clitoris,
containing
corpora
cavernosa
Clitoris (glans)
Crus of clitoris
External
urethral orifice
Vaginal orifice
Bulb of
vestibule
Fourchette
© 2014 Pearson Education, Inc.
Greater
vestibular
gland
Figure 26.17a Structure of lactating mammary glands.
Skin (cut)
Pectoralis major muscle
Suspensory ligament
Adipose tissue
Lobe
Areola
Nipple
Opening of lactiferous duct
Lactiferous sinus
Lactiferous duct
Lobule containing alveoli
© 2014 Pearson Education, Inc.
Figure 26.17b Structure of lactating mammary glands.
First rib
Skin (cut)
Pectoralis major muscle
Suspensory ligament
Adipose tissue
Lobe
Areola
Nipple
Opening of lactiferous duct
Lactiferous sinus
Lactiferous duct
Lobule containing alveoli
Hypodermis
(superficial fascia)
Intercostal muscles
© 2014 Pearson Education, Inc.