5. Seminiferous tubules: stratified epithelium
are located in the testes, and are the specific
location of meiosis, and the subsequent
creation of gametes, namely spermatozoa.
The epithelium of the tubule consists of
sustentacular or Sertoli cells, which are tall,
columnar type cells that line the tubule.
In between the Sertoli cells are
spermatogenic cells, which differentiate
through meiosis to sperm cells.
6.
7. Hormones
Spermatogenesis controlled by
– FSH (follicle stimulating hormone) from
pituitary
– Testosterone from Leydig (interstitial) cells
of testes
– secretions from Sertoli cells
8. Sustentacular (Sertoli) cells
Nurse cells
Extend from basal lamina to lumen
Connected to each other by tight
junctions
Nourish spermatogenic cells
Transport spermatogenic cells
Phagocytize excess cytoplasm
Secretions regulate spermatogenesis
24.4c
16. The seminal vesicle it is a coiled, sacculated tubular structure
that is surrounded by a smooth muscle coat (bracket).
Generally, this smooth muscle contains inner circular and outer
longitudinal layers.
The highly folded mucosa of the seminal vesicle is illustrated
below, lined with high cuboidal to low columnar epithelium. One
may also find some variable pseudostratified columnar
epithelium.
24.1
17. LOBES OF THE PROSTATE
Anatomically, prostate are divided
into 5 lobes :
1) One anterior lobe
2) One posterior lobe
3) One median or middle lobe
4) Two lateral lobes
19. Fig. : Cross section of the prostate
CENTRAL ZONE
PERIPHERAL
ZONE
• account for
25% to 75% of
glandular
tissues
• duct of the
glands mainly
open into
prostatic
sinuses
• surrounded
by peripheral
zone
• duct of the
glands open
into prostatic
sinuses and
colliculus
seminalis
BackBack
21. Mucosal glands
• inner periurethral
glands
• lies in the mucosal
layer of the urethra
• open directly into
the urethra
• situated in the
middle lobe
Fig. : Cross section of the prostate