Biology, human reproduction system. Not mine, all credits to my teacher Ms.Ruth.

1. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
PowerPoint Lectures for
Biology, Seventh Edition
Neil Campbell and Jane Reece
Lectures by Chris Romero
GENERATIF REPRODUCTION IN ANIMALS

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1. Animal Gametogenesis
SPERMATOGENESIS
• Occurs in sperm producing organ called testis by special cells
called spermatogonia (sperm parent cell).

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Spermatogonia then
experience mitosis to form
primary spermatocyte. 1
primary spermatocyte will
experience meiosis I to form
2 secondary spermatocytes.
Each secondary
spermatocytes experiences
meiosis II to form 4
spermatid cells. Spermatid
then will differentiate in to
sperm cell.

4. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
1. Animal Gametogenesis
OOGENESIS
• Occurs in the ovarium

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Oogenesis started by
mitosis from oogonium to
form prymary oocyte.
Prymary oocyte then will
divide itself in meiosis I to
form 2 cell which are
different in size. The larger
cell is called secondary
oocyte and the smaller cells
is called polar body I.
Oocytes then experience
meiosis II to form 2 different
size cells again. The larger
cell is called ootid and the
smaller cels is called polar
body II. Polar body I will
experience meiosis II to form
polar body II. Ootid will
develop become temporary
ovum while 3 polar body II
degenerated.

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Internal Fertilization, occurs inside the
female body.
External Fertilization, occurs outside the female body. In
external fertilization, male and female gametes will be
produced and excreted in large numbers to the
environment (ussually in the water or wet condition)
Fertilization

7. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
PowerPoint Lectures for
Biology, Seventh Edition
Neil Campbell and Jane Reece
Lectures by Chris Romero
The Human Reproductive System

8. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings

9. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
• Testis – male gonads
• Epididymis - structure in the male
reproductive system in which sperm
fully mature and are stored – Sperm is
produced in the seminiferous tubules
• vas deferens - tube that carries sperm
from the epididymis to the urethra
• Prostate gland – large gland that
secretes semen directly into the
urethra
• Urethra - tube through which urine
and semen are released from the
body
• Penis - external male reproductive
organ that connects the urethra to the
outside of the body

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Female Reproductive System

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• Ovaries – where meiosis occurs
• Fallopian tubes (oviduct) – where fertilization occurs; after
ovulation the egg moves through the oviduct to the uterus.
• Uterus – where the blastula stage of the embryo will
implant and develop during the 9 month gestation.
• Vagina – birth canal.
• Cervix – mouth of the uterus.
• Endometrium – lining of the uterus.
• In addition to producing eggs, the female reproductive
system prepares the female’s body to nourish a developing
embryo.

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• Follicle - cluster of cells surrounding a single
egg in the human female reproductive system
• Ovulation - process in which an egg is
released from the ovary

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Female Reproductive System

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PowerPoint Lectures for
Biology, Seventh Edition
Neil Campbell and Jane Reece
Lectures by Chris Romero
Fertilization and Embryo
Development

15. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
Fertilization and Development
• Monoploid (n) Egg is Released
• Fertilization – Usually occurs in the upper region of the
fallopian tube
Zygote – a fertilized egg
• Cleavage – rapid mitotic divisions which occurs after
fertilization
Zygote  Morula  Blastula
• Implantation – Usually occurs 6 to 7 days after
fertilization.
Blastula  undergoes gastrulation  Gastrula
• Gastrulation - process of cell migration by which a third
layer of cells is formed within the cavity of a blastocyst

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21. Home Work:
Please looking for 5 deseases in
the reproductive system 

22. Thank You Guys 