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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

Lined by alternating tall ciliated and short non-ciliated (uneven/scalloped epithelium)

Non-ciliated cells with microvilli coated with glycocalyx

W/ only motile cilia in the male repro tract

Ductuli Efferentes

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