Flashcards in male reproductive system Deck (59)
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1
exocrine function of testis
production of spermatozoa
2
endocrine function of testis
secretion of testosterone
3
Accessory reproductive glands
seminal vesicle
prostate gland
cowper’s gland/bulbo-urethral glands
4
organ of copulation
Penis
5
Testicular capsule:
outer layer
Tunica vaginalis
6
Testicular capsule
most prominent layer
Tunica albuginea
7
Testicular capsule:
innermost layer
Tunica vasculosa
8
testicular capsule is capable of
contraction
9
Few & found in between the spermatogenic cells
Tall, columnar, pillar-like cells extending upward through the full thickness of the epithelium
sertoli cells
10
functions of sertoli cells
Functions:
For mechanical support & protection of the developing sperm cells
Play an active role in the release of mature spermatozoa
Phagocytic activity – digest cytoplasmic fragments
Steroid production from progesterone
5. Secretes androgen binding protein &
inhibin in the adult
6. Receptor-mediated binding of testosterone &
its metabolism to dehydrotestosterone
7. Serves as a conduit for the passage of
nutrients from the blood vascular system to
the spermatocytes & spermatids
11
Sperm cells closely associated between Sertoli cells
4-8 layers from the basal lamina to the lumen
Differentiate progressively from basal region to the lumen
Most mature are nearest to the lumen
spermatogenic cells
12
Comprises the entire sequence of events by which the spermatogonia are transformed into spermatozoa
spermatogenesis
13
PHASE OF SPERMATOGENESIS
The most primitive spermatogonia give rise to several successive generations of spermatogonia and yields spermatocytes
Spermatocytogenesis
14
PHASE OF SPERMATOGENESIS
The spermatocytes undergo two maturation division which reduce the chromosomal number by half & produce a cluster of spermatids
2. Meiosis
15
PHASE OF SPERMATOGENESIS
The spermatids undergo a series of cytological transformation leading to formation of spermatozoa
Spermiogenesis
16
Slender motile flagellated bodies
Mature sperm
17
3 Phases of spermatogenesis
Spermatocytogenesis
2. Meiosis
Spermiogenesis
18
single ejaculation contains how many sperms
200-600 M
19
Inactive in the ducts; activated by secretions of accessory genital glands
Longer lifespan in the male genital tract than in the female reproductive tract
Mature Sperm
20
parts of the mature sperm
head
tail
21
parts of the tail of mature sperm
a. Neck
b. Middle piece
c. Principal piece
d. End piece
22
part of sperm
Flattened ovall body, pear shaped
Made up of the nucleus carrying all genetic traits
Acrosomal cap
head
23
part of sperm tail
Core – axoneme
Ring of 9 dense course fibers
Mitochondrial sheath
middle piece
24
part of sperm tail
Longest portion
Absence of mitochondrial sheath
Outer course fibers and fibrous sheath
Principal piece
25
part of sperm tail
Short slender terminal segment
Covered only by flagellar membrane
End Piece
26
Endocrine component of the testis
Produces androgens
Irregular polyhedral closely packed, occurring in clusters
With extensive SER
Interstitial Cell of Leydig
27
Short straight continuation of the seminifrous tubule
w/o Spermatogenic cells; only sertoli cells
tubuli recti
28
Network of anastomosing channels found in the mediastinum
Cuboidal lining epithelium
rete testis
29
Arises from the rete testis
Forms 10 conical bodies (coni vasculosi)
Ductuli Efferentes
30
