2.Male Reproductive System 1. Boys have different sex organs than girls 2 In boys, the sex organs...
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Transcript of 2.Male Reproductive System 1. Boys have different sex organs than girls 2 In boys, the sex organs...
2. Male Reproductive System
1
Boys have different sex organs than girls
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In boys, the sex organs are 2 testes
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Vocabulary:
testes
Male sex organs that produce hormones and sperm
The testes are on the outside of the male’s body
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They are in a sac of skin called the scrotum
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Vocabulary:
scrotum
A sac of skin that holds the testes in males
Sex organs work as glands and make
hormones
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During puberty, they make a boy’s body change to look more like a man’s
body
They are also important in reproduction
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That is why sex organs are part of the reproductive system
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Vocabulary:
Reproductive system
The body system in which sperm cells or egg cells are made
Testes make cells called sperm
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Vocabulary:
sperm
The male reproductive cells made in the testes
Sperm are so small you need a microscope to see them
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Males begin making sperm when the reach puberty and hundreds of millions
are made in a lifetime
Millions of sperm leave the testes and pass along a long, thin tube
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The sperm will mix with fluid to make semen
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Vocabulary:
semen
A mixture of a fluid and sperm cells
The semen passes into another tube under the bladder
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This tube, the urethra, is in the penis and leads semen out of the body
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Vocabulary:
urethra
A tube that leads semen and urine out of the male’s body
A sperm cell must come together with an egg cell from a female
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for a baby to form
First, sperm has a long, threadlike tail that moves back and forth
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Which helps push the sperm along to swim to the egg cell
If a sperm meets an egg, they can join
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Only one sperm cell can be used for fertilization of an egg cell
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Vocabulary:
fertilization
When a sperm cell joins with an egg cell
The fertilized egg, called zygotes, begins to grow and divide
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It forms 2 cells
Then the 2 cells divide and form 4 cells and so on to form an embryo
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In about 9 months a new human life begins that is called a baby