Read in the name of GOD who created you…

WELCOME

HUMAN REPRODUCTIO

N

3

• HUMAN REPRODUCTIVE SYSTEM MALE REPRODUCTIVE SYSTEM FEMALE REPRODUCTIVE SYSTEM

• GAMETOGENESIS SPERMATOGENESIS OOGENESIS

• MENSTRUAL CYCLE (REPRODUCTIVE CYCLE)• FERTILIZATION AND IMPLANTATION• PARTURITION AND LACTATION

• HUMAN REPRODUCTIVE SYSTEM MALE REPRODUCTIVE SYSTEM FEMALE REPRODUCTIVE SYSTEM

• GAMETOGENESIS SPERMATOGENESIS OOGENESIS

• MENSTRUAL CYCLE (REPRODUCTIVE CYCLE)• FERTILIZATION AND IMPLANTATION• PARTURITION AND LACTATION

Topics to be discussed

HUMAN REPRODUCTIVE

SYSTEM

5

6

• Reproduction is the production of young ones by an organism. • Humans are sexually reproducing and viviparous.

MALE REPRODUCTIVE SYSTEM

7

8

Male reproductive system

Male reproductive system

Paired testesPaired testes

Accessory ducts

Accessory ducts

Rete testisRete testis

Vasa efferentiaVasa efferentia

Epididymis Epididymis

Vas deferensVas deferens

Accessory glands

Accessory glands

A prostate glandA prostate gland

Paired seminal vesicles Paired seminal vesicles

Paired Cowper’s glands (bulbo-urethral glands)Paired Cowper’s glands (bulbo-urethral glands)External

genitalia (Penis)External

genitalia (Penis)

Primary sex organs that produce sperms & testosterone.

Testes are formed within the abdomen. Soon after the birth or at the 8th month of pregnancy they descent into the scrotal sac (scrotum) through inguinal canal.

The low temperature (2-2.50 C less than the body temperature) of scrotum helps for proper functioning of testes and for spermatogenesis.

9

1. Paired testes

1. Paired testes

• Each testis is oval in shape. • Length 4-5 cm,

width: 2-3 cm.• Each testis has about 250

testicular lobules. • Each lobule contains 1-3

coiled seminiferous tubules.

• Each testis is oval in shape. • Length 4-5 cm,

width: 2-3 cm.• Each testis has about 250

testicular lobules. • Each lobule contains 1-3

coiled seminiferous tubules.

• Seminiferous tubule is lined internally with spermatogenic cells (spermatogonia or male germ cells) & Sertoli cells (supporting cells). • Sertoli cells give shape and

nourishment to developing spermatogenic cells.

• Seminiferous tubule is lined internally with spermatogenic cells (spermatogonia or male germ cells) & Sertoli cells (supporting cells). • Sertoli cells give shape and

nourishment to developing spermatogenic cells.

The regions outside the seminiferous tubules (interstitial spaces) contain

Small blood vessels.Interstitial cells or Leydig cells. They secrete testicular hormones (androgens). Immunologically competent cells

11

1. Paired testes

12

13

The urethra receives the ducts of prostate and Cowper’s glands and passes through the penis.

They include ◦ A pair of seminal vesicles◦ A prostate gland ◦ A pair of Cowper’s glands

(bulbo-urethral glands).

14

3. Accessory glands

Their collective secretion (seminal plasma) is rich in fructose, Ca and enzymes. It Helps for transporting sperms Supplies nutrients to sperms Provides an alkaline medium

to counteract the acidity of the uterus.

Secretions of Cowper’s glands lubricate the penis.

15

4. Penis (external genitalia)

• It is a copulatory organ • It is made up of special

erectile spongy tissues. • Penis erects when the

spongy tissue is filled with blood. It facilitates insemination.

• The cone-shaped tip of the penis is called glans penis which is covered by prepuce (foreskin).

• It is a copulatory organ • It is made up of special

erectile spongy tissues. • Penis erects when the

spongy tissue is filled with blood. It facilitates insemination.

• The cone-shaped tip of the penis is called glans penis which is covered by prepuce (foreskin).

CHECK YOUR GRASP

?

Odd man out

A. Prostate B. Epididymis C. Seminal vesicleD. Cowper’s glands

Which is false statement?

A. Testes are the primary sex organ of male.B. Sertoli cells give nourishment to developi

ng sperms.C. Leydig cells produce androgen.D. Rete testis temporarily stores sperms.

Which gland lubricates the penis?

A. Cowper’s glandB. Prostate glandC. Seminal vesicleD. All of the above

The cone shaped tip of the penis is called

SEE PART 2

Prepared byMUHAMMED ALI. K.C

DEPARTMENT OF ZOOLOGYPh: 9544187632

Email: mailtokcm@gmail.combankofbiology.blogspot.com

fourhomes.blogspot.com