During this term we are going to start to study the vital function of Nutrition. Many body systems work for it. Let's go to see them.
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Digestion is the process that enables us to obtain nutrients from the food we eat.
The digestive system is a long tube that starts in the mouth and ends in the anus
Other organs are the stomach, the small intestine and
The digestive system is a long tube that starts in the mouth and ends in the anus
Other organs are the stomach, the small intestine and
the large intestine
The respiratory system is the group of organs that help
our body obtain oxygen from the air.
Our body needs oxygen for many processes such as digestion
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The circulatory system constantly moves blood inside
our body.
The heart pumps blood through blood vessels.
Arteries veins and capillaries are blood vessels.
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The kidneys filter the blood, eliminate waste and
produce urine. These are one part of the
the excretory system with the bladder.
After Christmas we will start to study the Vital Function of Reproduction. Thanks to this function we can preserve our species.
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People reproduce. When a man and a woman are old enough, they can make
a baby together. This is called sexual reproduction.
Men and women have reproductive systems.
These consist of their sex organs.
Men and women have different sex organs.
• Men have a penis, testicles and a prostate
gland.
Men make sperm.
• Women have a vulva, vagina, uterus and ovaries.
Women make eggs.
When a sperm from a man joins with an egg from a woman,
it is called fertilisation.
A foetus begins to grow in the woman’s uterus
Pregnancy
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Pregnancy is
the formation of a baby in its
mother's
womb.
. Babies are formed inside their
mother's womb or uterus.
The baby or
foetus is connected to the
mother by a
tube called the umbilical cord.
Through this
tube the baby receives
everything it
needs to develop, such as
food and
oxygen.
Development of the baby pregnancy
At the
beginning of pregnancy, the foetus is
as small as a
grain of sand.
After three
months, it is about ten
centimetres
long. The head, legs, arms,
fingers and
heart are fully formed.
At six months,
the baby is about thirty
centimetres
long, and moves a lot.
At nine months,
the baby is about fifty
centimetres long, and is ready to be born.
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