Histology Of Male Genital System

Question 1

What are the main components of the Male Reproductive System?

Answer 1

Testis, Genital ducts, Accessory glands, Penis

Question 2

What is the primary function of the Male Reproductive System?

Answer 2

Production of spermatozoa, Production of hormones, Production of secretion

Question 3

What covers the testis?

Answer 3

Tunica albuginea , thickened posteriorly as Mediastinum testis

Question 4

What structure divides the testis into testicular lobules?

Answer 4

Fibrous septa
Each lobule contain 2 Seminiferous tubules

Question 5

What are seminiferous tubules embedded in?

Answer 5

Loose connective tissue rich in blood and lymphatic vessels, nerves, and interstitial cells

Question 6

What type of epithelium lines the seminiferous tubules?

Answer 6

Stratified epithelium, also known as seminiferous epithelium or germinal epithelium

Question 7

What are the components of the seminiferous epithelium?

Answer 7

• Spermatogonia
• Primary spermatocyte
• Secondary spermatocyte
• Spermatid
• Sertoli cells

Question 8

What is the role of myoid cells in the seminiferous tubules?

Answer 8

Contractile cells that help in the movement of sperm

Question 9

When does sperm production begin and how long does it continue?

Answer 9

Begins at puberty and continues throughout life (no menopause)

Question 10

What are the stages of sperm development?

Answer 10

• Proliferation
• Growth
• 1st maturation division (meiosis)
• 2nd maturation division (mitosis)

Question 11

What forms the head of the sperm?

Answer 11

Nucleus

Question 12

What is the function of the acrosome?

Answer 12

Secretes enzymes that facilitate penetration of the ovum

Question 13

What provides energy to the tail of the sperm?

Answer 13

Mitochondria forming a helical sheath around the axial filament

Question 14

What is the composition of semen?

Answer 14

• Sperms produced by the testis
• Fluid secretion from seminal vesicles, prostate, bulbo-urethral glands

Question 15

What is the normal volume of one ejaculate?

Answer 15

2-3 cc = (200-300) million sperm

(1 cc = 100 million sperms )

Question 16

How many sperms are considered fertile per cc of semen?

Answer 16

20 million sperms/cc

Question 17

What is the pathway of sperm during ejaculation?

Answer 17

Epididymis → Vas deferens → Ejaculatory duct → Urethra

Question 18

What are Sertoli cells and their functions?

Answer 18

• Support, nutrition, and protection of developing spermatozoa
• Phagocytosis
• Secretion of androgen binding protein
• Production of Anti-Müllerian hormone
• Formation of blood-testis barrier
• Production of inhibin B, which suppresses FSH

Question 19

What fills the interstitial tissue in the testis?

Answer 19

Loose connective tissue

Question 20

What are leading cells :

Answer 20

additional cell type, the Leydig cell is found
• It has the characteristics of steroid secreting cell
• It synthesizes and secretes testosterone

Question 21

What epithelium lines the straight ductules and Rete testis?

Answer 21

Simple cuboidal epithelium

Question 22

What is the structure and function of the ductus epididymis?

Answer 22

Highly coiled tube lined with pseudostratified ciliated columnar epithelium, containing mature sperms

Question 23

What are the muscular layers of the vas deferens?

Answer 23

• Inner longitudinal
• Middle circular
• Outer longitudinal

Question 24

What is the prostate gland surrounded by?

Answer 24

Fibroelastic capsule

Question 25

What is the function of prostatic fluid?

Answer 25

Contributes to semen composition

Question 26

What are corpora amylacea?

Answer 26

Small, round, laminated structures found within the prostatic glands, composed of glycoproteins and calcified material

Question 27

What are the three cylindrical masses of the penis composed of?

Answer 27

Erectile tissue with venous spaces lined with endothelial cells

Question 28

What supplies blood to the sinuses in the penis?

Answer 28

Helicine arteries

Question 29

What happens during erection?

Answer 29

Dilatation of arteries leads to engorgement of vascular arteries, compressing venous outflow

Question 30

What is the type of dementia fluid and what type of sugar it contains ?

Answer 30

Alkaline fluid , Fructose for nourishing the sperms

Question 31

Mention the abnormal shapes of sperms ?

Answer 31

Giant , microsperm , double head , double body , long head , rough head , abnormal middle

Question 32

Define Sertoli cells :

Answer 32

Pyramidal cells occupy the whole width of seminiferous tubules Partially envelope cells of spermatogenic lineage • The base is on the basal lamina while the apex at the lumen of the tubule • Borders are ill defined • Nucleus is pyramidal with prominent nucleolus

Question 34

What is the interstitial space ?

Answer 34

Found btwn seminiferous tubules

Question 35

The interstitial tissue contains :

Answer 35

Fibroblasts , mast cells , macrophages , undifferentiated connective tissue cells