Transcript Human Growth and Development

Rules
 Be respectful to others in class
 Use appropriate language
 Discussions are to remain in this classroom
 Share your learning experience with a trusted adult (if
you feel you want to)
What does the word Puberty
mean?
Puberty is a stage of
growth and change
between childhood and
adulthood.
Changes during puberty are
marked by:
Physical changes
Emotional changes
Social changes
Physical Changes
Growth spurt
Reproductive system
maturing
Muscle development
Emotional Changes
Mood swings
Social Changes
Increased responsibility
Increased independence
Changes in relationships
with family and friends
The Endocrine System
What are
Hormones?
Hormones are:
Chemical messengers released by
endocrine glands that tell your cells
what to do
Hormones travel around the body in
the blood stream
Hormones are released at exactly the
right time and have many important
functions
Hormones also:
Tell your bones to grow longer
Enable yourself to use glucose (sugar)
to produce energy
Begin the changes of puberty
Major Endocrine Glands and
Functions
 Pituitary Gland
 Thyroid Gland
 Pancreas
 Adrenal Glands
 Ovaries (females only)
 Testes
 Thymus
Pituitary Gland
 It is the master gland that controls other glands and
secretes many hormones
 It is pea-sized and located in the brain behind the eyes
 The Pituitary is responsible for releasing hormones
such as:
 Estrogen in females
 Testosterone in males
That signal the onset of puberty
Thyroid Gland
 Consists of two lobes located on either
side of the wind pipe
 The thyroid controls your metabolism
(the rate at which the body burns food)
 During puberty appetite often
increases due to rapid growth which
requires more food
Thymus
 Located in the chest area
 Two lobes along the trachea
 Builds up our immune system
 Decreases in size after you reach
puberty
 Prevents us from getting illnesses and
diseases
Pancreas
Produces insulin, a hormone
that allows the body to digest
glucose (sugar) to provide
energy for all bodily
functions
Adrenal Glands
 Two glands located in the lower back
that attach to the top of the kidneys
 The adrenal glands produce adrenaline
and other hormones enabling the body
to respond to stress and danger
 Adrenaline is sometimes known as the
“fright or flight” hormone
Testes
Located externally in the lower
pelvis (in males only)
Two oval shaped testicles are also
part of the male reproductive
system with produce and release
sperm, which is a male
reproductive cell
Ovaries
Located in the lower abdomen and
also part of the reproductive system
in females only
Females have two ovaries that store
and release eggs, which are the
female reproductive cells
Changes you will see when
reaching puberty
Increased size in genitals
Growth of hair in new places (such
as: face, armpits, and pubic area)
Deeper voice
Production of sperm cells
acne
Male Reproductive System
 The male reproductive system matures
during puberty as testosterone signals
the production of sperm for the first
time
 The main purpose of the reproductive
system is to produce sperm which can
fertilize a female egg to create a baby
Male Anatomy
 Testicles
 Scrotum
 Vas Deferens
 Urethra
 Penis
 Seminal Vesicles
 Prostate Glands
Testicles
A male gland in which
sperm and sex hormones
like testosterone are
produced
Scrotum
The pouch of skin
that contains the
testicles
Vas Deferens
The tube that
carries sperm
from the testicles
Urethra
The duct through
which urine and semen
are discharged from the
body, although not at
the same time
Penis
Male organ that
allows a male to pass
urine and semen
from the body
Seminal Vesicles
A pair of simple tubular
glands that add a fructose
fluid to semen
The fluid provides
nutrient energy for sperm
Prostate Gland
Male gland located
below the bladder
that adds a chemical
fluid to semen
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