1. Lesson 2
Human reproductive system

2.  All living things reproduce.
 Reproduction may be SEXUAL or
ASEXUAL.

3.  For continuity of life
 Increase the number of individuals of
the same species
 Replaces those that die

4. Production of individuals with gametes

5. Sexual Reproduction Asexual reproduction
Male & Female parents One parent
Gametes involved No gamete

6. Sexual reproduction Asexual reproduction
Male & Female parents One parent
Gametes involved No gamete
Fertilization occurs No fertilization

7. Sexual Reproduction Asexual reproduction
Male & Female parents One parent
Gametes involved No gamete
Fertilization occurs No fertilization
Genes from both Gene from one
parents parent
Mixture 100% identical to
characteristics parent

8. Sexual Asexual
Reproduction reproduction
Male & Female
parents One parent
Gametes involved No gamete
Fertilization
occurs No fertilization
Genes from Gene from one
both parents parent
Mixture 100% identical to
characteristics parent
Variation No variation

9. Sexual Asexual
Reproduction reproduction
Male & Female
parents One parent
Gametes involved No gamete
Fertilization
occurs No fertilization
Genes from Gene from one
both parents parent
Mixture 100% identical to
characteristics parent
Variation No variation

10. Gamete: Sperm Gamete: Ovum
*Gonad – testes *Gonad – ovary
*Many sperm cells *One egg cell a month
*Smaller *Larger than a body cell
*Swims through liquid *Cannot move on its own
*Head, middle, & tail *Round shape

11.  Reproductive system functions in gamete
 Production
 Storage
 Nourishment
 Transport
 Fertilization
 Fusion of male and female gametes to form a zygote

12.  Parts of Male reproductive system
 Parts of Female reproductive system
 Direction of sperm movement until
fertilization occurs

13. Figure 28.1

14. Figure 28.3

15.  Functions
 Toproduce, maintain and transport
sperm (the male reproductive cells) and
protective fluid (semen)

16.  Functions
 Toproduce, maintain and transport
sperm (the male reproductive cells) and
protective fluid (semen)
 Toproduce and secrete male sex
hormones (testosterone) responsible for
maintaining the male reproductive
system

17. http://www.uh.edu/~tgill2/image010.jpg

18. Mix with fluid and mucus
(semen)
Typical ejaculate = 2-5 ml
Contains between 20 –
100 million sperms per ml

19.  Testes
/ testicles
(Gonads)
 Produce sperm
(Spermatogenesis)
 Sperm production begins
at puberty and
continues throughout
the life of a male

20.  Testes
/ testicles
(Gonads)
 Produce
testosterone
 Hair patterns and
voice changes
 Development of the
male accessory organs
(prostate, seminal
vesicles etc.)
 Stimulates the effect
of protein building in
the body that is
responsible for the
greater muscle
development and
strength of the male

21.  Duct System
 Epididymis
 Sperm mature in
epididymis
 Vas Deferens
 Transports mature
sperm to the
urethra
 Ejaculatory ducts
 empty into the
urethra

22.  Seminal vesicles
 Attached to vas
deferens
 Produce a sugar-
rich fluid
(fructose) that
provides energy
to sperm

23.  Prostate Gland
 Makes fluid and
mucus

24.  Urethra
 Tube that carries
urine from the
bladder to outside
of the body
 Also carries
semen out of the
body

25.  Functions
 Produces the female egg cells - ovum
 Transports the eggs to the site of fertilization
 The fertilization of an egg by a sperm, occurs in
the Fallopian tubes

26. Figure 28.13

28. Functions
 Place for a baby to develop
 Iffertilization does not take place, the
system is designed to menstruate
 Produces female sex hormones that
maintain the reproductive cycle.

30.  Pathway of ovum to
uterus
 Fertilization occurs
here
 Thefertilized egg
then moves to the
uterus for
development
http://www.ricancercouncil.org/img/cervical.gif

31.  Protection
 Nutritional
support for fetus
 Waste removal for the developing
embryo and fetus

32.  Lower part of uterus
Allows sperm to enter uterus
For menstrual blood to exit
Connects to vagina

33.  Canal that joins the
cervix (the lower part
of uterus) to the
outside of the body
 Birth canal
 Allow penis to enter