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So far we've seen the various
changes that occur in an adolescent.
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In this video, we will be discussing
about an important concept of how
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secondary sexual characters develop.
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Wait a second.
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Do we know what exactly these
secondary sexual characters are?
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Secondary, sexual, charact.
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They are characters that are
exclusive to the individual sex
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of a person and are not primary.
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What does this statement mean, by the way?
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By the word sex?
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I mean the sex of the
individual, male or female?
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By not primary.
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I mean the characters which are not
required for the process of reproduction.
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That's why we call them secondary.
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In boys for instance,
there is a growth of.
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Have you ever seen girls
having a long or trimmed beard?
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Of course not.
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However, it is an exclusive character
of males which is not found in females.
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So this is the simplest example
to understand the concept of
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secondary sexual characters.
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Let us understand the
concept with another example.
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In case of females, one extremely
important physical change during
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puberty is the enlargement of breasts.
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It is exclusively found
in adolescent females.
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So are there any other set of
secondary sexual characters
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seen in males and females?
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Yes, of course.
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Apart from the growth of facial hair, the
growth of hair on the chest, under the
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arms and in the pubic region are other
examples of secondary sexual charact.
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Similarly in females, apart from breast
development, hair growth around the pubic
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region and under the arms is also seen.
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So in a nutshell, the secondary sexual
characters are those characters,
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which are not really required as
a part of reproductive system.
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But do you know what exactly
makes these secondary sexual
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characters developed during puberty?
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These characters are all thanks to
the hormones secreted by the gona.
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Yes, hormones are the most
important players in this process.
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The male gnats called testes secrete the
male sex hormone called the testosterone.
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This is responsible for not only the
development of the reproductive tissues,
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but also for the development of the
secondary sexual characters in males.
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And the same is applicable to
the female sex hormone called the
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estrogen secreted by the ovaries.
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It brings about the development
of female reproductive tissues.
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At the same time, it takes up
the responsibility of developing
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the secondary sexual characters
in the female individuals.
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Who do you think controls the activities
of these hormones in our body?
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The hormones regulate several processes.
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But who regulates the
secretion of these hormones?
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Exactly.
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The Mastermind to control all
the hormonal secretions is the
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gland called the pituitary gland.
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Next, we will talk about these
hormones, their major roles,
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and how they bring about all the
necessary activities inside a body.
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