Download heredity , growth and the endocrine system - 6thgrade

Lizzy
Julianna
Kenneth
Norman
• Heredity : The passing traits
from parents to children .
• Environment : All the things
that surround you everyday .
• Hormones : chemicals produce
by glands that regulate many
body functions
• Glands : Groups of specialized
cells that produce hormones .
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Your heredity is all the body characteristics you inherit
from your parents, whether it is your mother’s black hair
or your father’s knobbly knees.
Characteristics are passed on by the genes carried on your
chromosomes.
The basic laws of heredity were discovered by the Austrian
monk Gregor Mendel 150 years ago.
Your body characteristics are a mix of two sets of
instructions — one from your mother’s chromosomes and
the other from your father’s.
Each characteristic is the work of only one gene — either
your mother’s or your father’s. This gene is said to be
expressed.
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A gene that is not expressed does not
vanish. Instead, it stays dormant
(inactive) in your chromosomes,
possibly to pass on to your children.
A gene that is always expressed is
called a dominant gene.
A recessive gene is one that loses out
to a dominant gene and stays
dormant.
A recessive gene may be expressed
when there is no competition — that
is, when the genes from both of your
parents arc recessive.
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Julianna : Has traits of mom and
dad, but most are from dad.
Kenneth: Has more traits from
mom.
Lizzy : Has traits of mom and dad
.
Norman: Has more traits from
mom.
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The Human Growth Foundation is a voluntary,
non-profit organization whose mission is to
help children, and adults with disorders of
growth and growth hormone through
research, education, support, and advocacy.
The Foundation is dedicated to helping
medical science to better understand the
process of growth. It is composed of
concerned parents and friends of children,
and adults, with growth problems; physicians;
and, other interested health professionals.
. the most important hormones secreted by
 One of
the pituitary gland is HGH or human growth hormone.
Human growth hormone stimulates the growth of
muscles and bones and helps regulate metabolism, and
influences sexual enjoyment. HGH can sharply increase
the flow of sugar into muscle and fat, stimulate protein
production in liver and muscle, and slow the production
of fatty tissue. More prolonged effects of human growth
hormone -- blocking the uptake and use of sugars,
causing blood sugar levels to rise, and increasing the
production of fat and fat levels in the blood -- seem to
counteract its immediate positive effects. In many
cases, human growth hormone appears to work by
activating a number of growth factors, the most
important of which is insulin-like growth factor I (IGF-I)
 Endocrine
System: The
bodily system that consists
of the endocrine glands that
release their secretions
(hormones) into the
bloodstream to reach and
act on target cells of
specificorgans.
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In general, the endocrine system is in charge of
body processes that happen slowly, such as cell
growth. Faster processes like breathing and
body movement are controlled by the nervous
system. But even though the nervous system
and endocrine system are separate systems,
they often work together to help the body
function properly.
Gland:
an aggregation
of cells specialized to
secrete or excrete
materials not related to
their ordinary metabolic
needs.
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Some
types
of  Endocrine glands,
glands release their on the other hand,
secretions
in release more than
specific areas. For 20 major hormones
instance, exocrine directly into the
glands, such as the bloodstream where
sweat and salivary they
can
be
glands,
release transported to cells
secretions in the in other parts of
skin or inside of the body.
the mouth.
 Hormone:
A
chemical
substance produced in the
body that controls and
regulates the activity of
certain cells or organs.
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Hypothalamus
Pituitary gland
Thyroid
Parathyroid
Adrenal glands
Pineal gland
Reproductive glands(which includes the
ovaries and testes)
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attention