3. From cells to body tissues
• The basic building blocks for
life are called cells - eg. nerve
cell
Friday, March 6, 2009
4. From cells to body tissues
• The basic building blocks for
life are called cells - eg. nerve
cell
Friday, March 6, 2009
5. From cells to body tissues
• The basic building blocks for
life are called cells - eg. nerve
cell
• A group of similar cells that
perform the same work are
called tissues - eg. cluster of
nerve cells
Friday, March 6, 2009
6. From cells to body tissues
• The basic building blocks for
life are called cells - eg. nerve
cell
• A group of similar cells that
perform the same work are
called tissues - eg. cluster of
nerve cells
Friday, March 6, 2009
7. From cells to body tissues
• The basic building blocks for
life are called cells - eg. nerve
cell
• A group of similar cells that
perform the same work are
called tissues - eg. cluster of
nerve cells
• Different types of tissues that
perform a particular job form
a structure called an organ -
eg. the brain
Friday, March 6, 2009
8. From cells to body tissues
• The basic building blocks for
life are called cells - eg. nerve
cell
• A group of similar cells that
perform the same work are
called tissues - eg. cluster of
nerve cells
• Different types of tissues that
perform a particular job form
a structure called an organ -
eg. the brain
Friday, March 6, 2009
9. From cells to body tissues
• The basic building blocks for
life are called cells - eg. nerve
cell
• A group of similar cells that
perform the same work are
called tissues - eg. cluster of
nerve cells
• Different types of tissues that
perform a particular job form
a structure called an organ -
eg. the brain
• A body system is a group of
organs that perform a body
function - eg. The nervous
system
Friday, March 6, 2009
10. From cells to body tissues
• The basic building blocks for
life are called cells - eg. nerve
cell
• A group of similar cells that
perform the same work are
called tissues - eg. cluster of
nerve cells
• Different types of tissues that
perform a particular job form
a structure called an organ -
eg. the brain
• A body system is a group of
organs that perform a body
function - eg. The nervous
system
Friday, March 6, 2009
12. Body systems work together
• Body systems depend on one another and are
interrelated. Here are some body systems:
Friday, March 6, 2009
13. Body systems work together
• Body systems depend on one another and are
interrelated. Here are some body systems:
• Skeletal muscular system
Friday, March 6, 2009
14. Body systems work together
• Body systems depend on one another and are
interrelated. Here are some body systems:
• Skeletal muscular system
• Circulatory system
Friday, March 6, 2009
15. Body systems work together
• Body systems depend on one another and are
interrelated. Here are some body systems:
• Skeletal muscular system
• Circulatory system
• Respiratory system
Friday, March 6, 2009
16. Body systems work together
• Body systems depend on one another and are
interrelated. Here are some body systems:
• Skeletal muscular system
• Circulatory system
• Respiratory system
• Nervous system
Friday, March 6, 2009
17. Body systems work together
• Body systems depend on one another and are
interrelated. Here are some body systems:
• Skeletal muscular system
• Circulatory system
• Respiratory system
• Nervous system
• Digestive & Excretory system
Friday, March 6, 2009
18. Body systems work together
• Body systems depend on one another and are
interrelated. Here are some body systems:
• Skeletal muscular system
• Circulatory system
• Respiratory system
• Nervous system
• Digestive & Excretory system
• Endocrine system
Friday, March 6, 2009
20. Adolescence:
A Time of Change
Friday, March 6, 2009
21. • Adolescence is the period between
childhood and adulthood
60 +
30 - 60 Late Adulthood
18 - 30 Middle Adulthood
12 - 18 Early Adulthood
2 - 12 Adolescence
0 - 2 Childhood
Infancy * approximate ages
Friday, March 6, 2009
22. Adolescence
• Adolescence begins with puberty:
• Puberty - the time when you develop traits of
adults of your gender and become physically
able to reproduce
• Hormones cause the physical changes which
usually start between the ages of 8 - 14 and end
between the ages of 16 - 20. Girls often enter
puberty earlier than boys.
• During adolescence your body develops in many
ways: Physically, Mentally & Emotionally, and
Socially.
Friday, March 6, 2009
23. Physical Changes
During puberty the female body
goes through many changes:
• the lining of the uterus • When the egg is not
begins to thicken each fertilized, the tissue is
month then released from the
body in the form of blood
• the ovaries release an egg
• This is called
Menstruation (a period)
• The egg travels through
the Fallopian tube
Friday, March 6, 2009
25. Mental & Emotional
During adolescence, you may experience
mood swings emotional changes that you
do not understand.
These emotional changes are due to the
changing levels of hormones in your body.
To handle these changes, try to expressing
them in healthy ways.
Practice self-control and don’t lash out at
others when you feel angry
Friday, March 6, 2009
26. Social
During adolescence, you begin to see yourself as being separate from
your parents.
You parents may give you more responsibility because they will see
that you are “growing up.”
Your relationships with others become very important to you. This is a
time when you may be strongly influenced by your friends.
As you get older, you will worry less about seeking your friend’s
approval and rely more on your own standards.
As you get older, you will become more independent
Friday, March 6, 2009
27. Influences on your personality
• Your personality is the sum total of your feelings, actions, habits
and thoughts.
• Like finger prints, your personality is unique and nobody is exactly
like you.
• Parts of your personality are inherited. But, it can also be shaped by
your:
• family & friends
• environment & places that surround you
• teachers & role models
Friday, March 6, 2009
28. Heredity & Growth
• Heredity is the process by which parents pass traits to their
children
• these traits may include: eye colour, hair colour, body
build, musical/athletic/artistic abilities etc.
• Parents pass down these traits through chromosomes
• these chromosomes are pairs of tiny, threadlike pieces
of matter that carry codes.
• each pair of chromosomes contain one chromosome
from your mother and one from your father.
• Each chromosome is divided into smaller sections called
genes.
Friday, March 6, 2009
29. Combining Chromosomes
• Almost every cell in our body contains
46 chromosomes (23 from each parent).
Reproductive cells do not!
• The reproductive cell in the female
body is an egg cell (only 23
chromosomes).
• The reproductive cell in the male body
is the sperm cell (only 23
chromosomes).
• When they combine, their
chromosomes pair up to produce a cell
with 46 chromosomes (this process is
called fertilization).
Friday, March 6, 2009
30. XX & XY
• Fertilized cells will develop into a male or
female based on special chromosomes in
sperm cells.
• Each sperm contain either an X or a Y
chromosome.
• Every egg cell contains only a Y
chromosome.
• If an X-carrying sperm combines with
the egg, it will produce a girl (XX)
• If a Y-carrying sperm combines with
the egg, it will produce a boy (XY)
Friday, March 6, 2009
31. Development Before Birth
• The fertilized egg develops
inside a mother’s uterus
• Uterus - is a pear-shaped
organ that expands as a
baby grows.
• The baby get its nourishment
through an umbilical cord
• Umbilical cord - is a
tube that connects the
lining of the uterus to the
unborn baby.
• It attaches to where the baby’s
navel (belly button) will form.
Friday, March 6, 2009
