malereproductivesystem-140511011110-phpapp01.pdf

By-
Mr. ASHOK BISHNOI
Lecturer, JINR
Introduction:-
 In human being the process is one of
sexual reproduction, in which the
male & female organ differ
anatomically& physiologically.
 Both male & females produce specialise
reproductive germ cells, called Gametes.
 The male gametes are called Spermatozoa
 The female gametes are called Ovum
malereproductivesystem-140511011110-phpapp01.pdf
malereproductivesystem-140511011110-phpapp01.pdf
Slide 6 of 22
Terminology:-
Sperm The reproductive cells in males.
Fertilization The process of a sperm cell joining with
an egg.
Testes The male reproductive glands.
Testosterone The sex hormone that affects the
production of sperm and signals certain
physical changes at puberty.
Scrotum A sac of skin that contains the testes.
Penis The external male sexual organ through
which sperm leave the body.
Semen The mixture of sperm and fluids produced
by the glands of the male reproductive
system.
Ejaculation The ejection of semen from the penis.
Infertility The condition of being unable to
reproduce.
Male reproductive organ are:-
 Testis (Gonads)
 Scrotum
 Seminal
 Prostate gland
 Urethra
 Panis
malereproductivesystem-140511011110-phpapp01.pdf
Function:-
 To produce sperm and protective fluid
(semen)
 To discharge sperm within the female
reproductive tract
 To produce male sex hormones
malereproductivesystem-140511011110-phpapp01.pdf
Adolescence
Puberty :-
 Begins: 9 – 14 yrs of age
 Abnormally early = precocious puberty
 Delayed = eunuchoidism
General Physical Changes
 Enlargement of the external and internal
genitalia
 Voice changes
 Hair growth
 Mental changes
 Sebaceous gland secretions thicken/increase 
acne
 Are the reproductive gland of the male.
 Each testis is an oval shaped.
 About 5 cm long and 2.5 cm wide & 3
cm thick
 Weighing 10–15 g each
 Located in the scrotum
Layers of testis:-
There are three layers of tissue
 Tunica vaginalis (Outer layer) There are
two layers of the tunica vaginalis: the visceral and the parietal.
 Tunica albginea (Middle layer)
 Tunica vasculosa (Inner layer)
malereproductivesystem-140511011110-phpapp01.pdf
Structure of testis:-
 There are about 200-300 lobules in each
testis.
 Each contains 1 to 4 -seminiferous
tubules that converge to form a single
straight tubule.
 Between the tubules are group of
intestinal cell (cells of Leydig), that
secret the hormone testosterone after
puberty.
 Epididymis, vas deferens and seminal
vesicles (male duct which transport
sperm to the penis)
malereproductivesystem-140511011110-phpapp01.pdf
malereproductivesystem-140511011110-phpapp01.pdf
malereproductivesystem-140511011110-phpapp01.pdf
Blood supply:-
 Blood supply:-By branch of testicular
artery.
 Venous drainage:-By testicular vein
 Lymph drainage:-By lymph node around
the aorta
 Nerve supply :-By the 10th
& 11th
thorasic
nerve
Function:-
 Production of sperm in the
seminiferus tubules of the testis.
 Production of Androgens,
Testesterone.
Slide 24 of 22
Male Reproductive System
Seminal vesicle
Prostate
gland
Bulbourethral
gland
Front View
Urinary bladder
Vas deferens
Urethra
Penis
Epididymis
Testis
malereproductivesystem-140511011110-phpapp01.pdf
• The ejection of semen from the penis is called ejaculation.
Release of Sperm
• Ejaculation occurs when muscles in the male reproductive
system and at the base of the bladder contract, forcing
semen through the urethra.
• Several million sperm cells are released during one
ejaculation.
• Ejaculation can occur when the penis is in an erect state.
malereproductivesystem-140511011110-phpapp01.pdf
Characteristics:-
 is only 0.06 mm long.
 A healthy sperm cell is usually a
white color
 Life span of sperm is 48 to 72 hrs
Functions:
 To deliver its set of genes to the egg
and to stimulate the egg to begin
development.
The Pathway of Sperm
Seminal
vesicle
Prostat
e gland
Bulbourethr
al gland
Vas deferens
Urethra
Penis
Epididymis
Testis
Sperm are produced in the testes. They
mature and are stored in the epididymis.
Sperm travel through the vas deferens to
the seminal vesicles.
Seminal vesicles add a fluid that provides
a source of energy for the active sperm.
The prostate gland adds a fluid that
protects the sperm.
The bulbourethral glands add a
lubricating fluid that aids the passage of
sperm through the urethra.
 Consists of skin and subcutaneous tissue
 A vertical septum, of subcutaneous tissue in the center
divides it into two parts, each containing one testis.
 Smooth muscle fibers in the subcutaneous tissue contract
to give the scrotum its wrinkled appearance.
 The cremaster musclecontrols the position of the scrotum
and testes.
 When it is cold or a man is sexually aroused, this muscle
contracts to pull the testes closer to the body for warmth.
malereproductivesystem-140511011110-phpapp01.pdf
malereproductivesystem-140511011110-phpapp01.pdf
 It is the accessory sex organ in male
 Position:-In lower abdomen on either
side of prostate.
 Each has a short duct that joins with
the ductus deferens at the ampulla to
form an ejaculatory duct, which then
empties into the urethra.
 The fluid is viscous and mucoid in
nature
Composition:-
 Fructose,
Prostaglandins,Proteins,Pepsinogen
,Ascorbic acid & Citric acid
malereproductivesystem-140511011110-phpapp01.pdf
The Pathway of Sperm
Seminal
vesicle
Prostat
e gland
Bulbourethr
al gland
Vas deferens
Urethra
Penis
Epididymis
Testis
Sperm are produced in the testes. They
mature and are stored in the epididymis.
Sperm travel through the vas deferens to
the seminal vesicles.
Seminal vesicles add a fluid that provides
a source of energy for the active sperm.
The prostate gland adds a fluid that
protects the sperm.
The bulbourethral glands add a
lubricating fluid that aids the passage of
sperm through the urethra.
Function:-
 Provide nutrition to sperm.
 Clotting of semen
 Help in fertilization
Accessory glands
 Are the seminal vesicles, prostate
gland, and the bulbourethral glands.
 These glands secrete fluids that
enter the urethra.
 Is ejaculated during sexual act.
 Is consist of sperm & product of accessory
glands.
 The sperm and secretions from the
bulbourethral gland contribute only a small
volume.
Properties of semen:-
 Specific gravity:1.028
 Volume: 2-6 ml/ejaculation
 pH: 7.5
Composition of semen:-
 Sperm: 10%
 Product from seminal vesicle:60%
 Product from prostate gland:30%
 It is consist of 20-30 separate glands.
 Weight it is about 40 gm
 It is open in to urethra.
 Position:- Situated in the pelvic cavity in
the front of the rectum & behind the
symphysis pubis.
Characteristics:-
 The secretions of the prostate are
thin, milky colored, and alkaline.
 Composition:-
Sodium,Calcium,Zink,Citrate,cholesterol
,Phospholipid,Cloting enzymes etc.
Function:-
 Maintenance of ph for fertilization.
 To control the flow of urine outside
the human body.
 Secretes a milky fluid that combines
with sperm to make semen.
malereproductivesystem-140511011110-phpapp01.pdf
 Is a cylindrical pendant organ located
anterior to the scrotum.
 Consists of three columns of erectile tissue
that are wrapped in connective tissue and
covered with skin.
 The single, midline ventral column
surrounds the urethra and is called the
corpus spongiosum.
 3 parts: a root, body (shaft), and glans penis.
 The root of the penis attaches it to the pubic
arch.
 The body is the visible portion.
malereproductivesystem-140511011110-phpapp01.pdf
Function:-
 Transfer sperm to the vagina.
 Extends from the urinary bladder to the
external urethral orifice at the tip of the
penis.
 It is a passageway for sperm and fluids
from the reproductive system and urine
from the urinary system.
 Divided into three regions:
The prostatic urethra, the membranous urethra
& the penile urethra.
Erection
 Involves increase in length, width &
firmness
 Changes in blood supply: arterioles
dilate, veins constrict
 The spongy erectile tissue fills with
blood
 Erectile Dysfunction [ED] also known
as impotence
Hormones
 Follicle-stimulating hormone (FSH)
stimulates spermatogenesis
 Interstitial Cell Stimulating Hormone
(ICSH) stimulates the production of
testosterone
 testosterone stimulates the
development of male secondary sex
characteristics.
malereproductivesystem-140511011110-phpapp01.pdf
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malereproductivesystem-140511011110-phpapp01.pdf

  • 2. Introduction:-  In human being the process is one of sexual reproduction, in which the male & female organ differ anatomically& physiologically.
  • 3.  Both male & females produce specialise reproductive germ cells, called Gametes.  The male gametes are called Spermatozoa  The female gametes are called Ovum
  • 6. Slide 6 of 22 Terminology:- Sperm The reproductive cells in males. Fertilization The process of a sperm cell joining with an egg. Testes The male reproductive glands. Testosterone The sex hormone that affects the production of sperm and signals certain physical changes at puberty. Scrotum A sac of skin that contains the testes.
  • 7. Penis The external male sexual organ through which sperm leave the body. Semen The mixture of sperm and fluids produced by the glands of the male reproductive system. Ejaculation The ejection of semen from the penis. Infertility The condition of being unable to reproduce.
  • 8. Male reproductive organ are:-  Testis (Gonads)  Scrotum  Seminal  Prostate gland  Urethra  Panis
  • 10. Function:-  To produce sperm and protective fluid (semen)  To discharge sperm within the female reproductive tract  To produce male sex hormones
  • 12. Adolescence Puberty :-  Begins: 9 – 14 yrs of age  Abnormally early = precocious puberty  Delayed = eunuchoidism
  • 13. General Physical Changes  Enlargement of the external and internal genitalia  Voice changes  Hair growth  Mental changes  Sebaceous gland secretions thicken/increase  acne
  • 14.  Are the reproductive gland of the male.  Each testis is an oval shaped.  About 5 cm long and 2.5 cm wide & 3 cm thick  Weighing 10–15 g each  Located in the scrotum
  • 15. Layers of testis:- There are three layers of tissue  Tunica vaginalis (Outer layer) There are two layers of the tunica vaginalis: the visceral and the parietal.  Tunica albginea (Middle layer)  Tunica vasculosa (Inner layer)
  • 17. Structure of testis:-  There are about 200-300 lobules in each testis.  Each contains 1 to 4 -seminiferous tubules that converge to form a single straight tubule.  Between the tubules are group of intestinal cell (cells of Leydig), that secret the hormone testosterone after puberty.
  • 18.  Epididymis, vas deferens and seminal vesicles (male duct which transport sperm to the penis)
  • 22. Blood supply:-  Blood supply:-By branch of testicular artery.  Venous drainage:-By testicular vein  Lymph drainage:-By lymph node around the aorta  Nerve supply :-By the 10th & 11th thorasic nerve
  • 23. Function:-  Production of sperm in the seminiferus tubules of the testis.  Production of Androgens, Testesterone.
  • 24. Slide 24 of 22 Male Reproductive System Seminal vesicle Prostate gland Bulbourethral gland Front View Urinary bladder Vas deferens Urethra Penis Epididymis Testis
  • 26. • The ejection of semen from the penis is called ejaculation. Release of Sperm • Ejaculation occurs when muscles in the male reproductive system and at the base of the bladder contract, forcing semen through the urethra. • Several million sperm cells are released during one ejaculation. • Ejaculation can occur when the penis is in an erect state.
  • 28. Characteristics:-  is only 0.06 mm long.  A healthy sperm cell is usually a white color  Life span of sperm is 48 to 72 hrs
  • 29. Functions:  To deliver its set of genes to the egg and to stimulate the egg to begin development.
  • 30. The Pathway of Sperm Seminal vesicle Prostat e gland Bulbourethr al gland Vas deferens Urethra Penis Epididymis Testis Sperm are produced in the testes. They mature and are stored in the epididymis. Sperm travel through the vas deferens to the seminal vesicles. Seminal vesicles add a fluid that provides a source of energy for the active sperm. The prostate gland adds a fluid that protects the sperm. The bulbourethral glands add a lubricating fluid that aids the passage of sperm through the urethra.
  • 31.  Consists of skin and subcutaneous tissue  A vertical septum, of subcutaneous tissue in the center divides it into two parts, each containing one testis.  Smooth muscle fibers in the subcutaneous tissue contract to give the scrotum its wrinkled appearance.  The cremaster musclecontrols the position of the scrotum and testes.  When it is cold or a man is sexually aroused, this muscle contracts to pull the testes closer to the body for warmth.
  • 34.  It is the accessory sex organ in male  Position:-In lower abdomen on either side of prostate.  Each has a short duct that joins with the ductus deferens at the ampulla to form an ejaculatory duct, which then empties into the urethra.  The fluid is viscous and mucoid in nature
  • 37. The Pathway of Sperm Seminal vesicle Prostat e gland Bulbourethr al gland Vas deferens Urethra Penis Epididymis Testis Sperm are produced in the testes. They mature and are stored in the epididymis. Sperm travel through the vas deferens to the seminal vesicles. Seminal vesicles add a fluid that provides a source of energy for the active sperm. The prostate gland adds a fluid that protects the sperm. The bulbourethral glands add a lubricating fluid that aids the passage of sperm through the urethra.
  • 38. Function:-  Provide nutrition to sperm.  Clotting of semen  Help in fertilization
  • 39. Accessory glands  Are the seminal vesicles, prostate gland, and the bulbourethral glands.  These glands secrete fluids that enter the urethra.
  • 40.  Is ejaculated during sexual act.  Is consist of sperm & product of accessory glands.  The sperm and secretions from the bulbourethral gland contribute only a small volume.
  • 41. Properties of semen:-  Specific gravity:1.028  Volume: 2-6 ml/ejaculation  pH: 7.5
  • 42. Composition of semen:-  Sperm: 10%  Product from seminal vesicle:60%  Product from prostate gland:30%
  • 43.  It is consist of 20-30 separate glands.  Weight it is about 40 gm  It is open in to urethra.  Position:- Situated in the pelvic cavity in the front of the rectum & behind the symphysis pubis.
  • 44. Characteristics:-  The secretions of the prostate are thin, milky colored, and alkaline.  Composition:- Sodium,Calcium,Zink,Citrate,cholesterol ,Phospholipid,Cloting enzymes etc.
  • 45. Function:-  Maintenance of ph for fertilization.  To control the flow of urine outside the human body.  Secretes a milky fluid that combines with sperm to make semen.
  • 47.  Is a cylindrical pendant organ located anterior to the scrotum.  Consists of three columns of erectile tissue that are wrapped in connective tissue and covered with skin.  The single, midline ventral column surrounds the urethra and is called the corpus spongiosum.
  • 48.  3 parts: a root, body (shaft), and glans penis.  The root of the penis attaches it to the pubic arch.  The body is the visible portion.
  • 51.  Extends from the urinary bladder to the external urethral orifice at the tip of the penis.  It is a passageway for sperm and fluids from the reproductive system and urine from the urinary system.  Divided into three regions: The prostatic urethra, the membranous urethra & the penile urethra.
  • 52. Erection  Involves increase in length, width & firmness  Changes in blood supply: arterioles dilate, veins constrict  The spongy erectile tissue fills with blood  Erectile Dysfunction [ED] also known as impotence
  • 53. Hormones  Follicle-stimulating hormone (FSH) stimulates spermatogenesis  Interstitial Cell Stimulating Hormone (ICSH) stimulates the production of testosterone  testosterone stimulates the development of male secondary sex characteristics.