Human Body Systems
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Transcript Human Body Systems
Human Body
Systems
How many human body systems are
there?
Digestive
Respiratory
Excretory
Circulatory
Skeletal
Muscular
Reproductive
Nervous
Endocrine
Nutrition
are substances in food
that provide raw materials and
energy the body needs to carry out
all essential processes.
Nutrients
There
are six kinds of nutrients:
carbohydrates, fats, proteins,
vitamins, minerals, and water.
Carbohydrates
Example
Sugar and
Starches
Function main source of
energy of life processes
Fat
Fat
Example oils, butter, cream
Functions A reserve energy
supply, building material for
certain cell structures
Nutrient
Protein
Example
Meat, eggs, beans,
milk, fish
Functions supplies amino
acids which make new cells and
body chemicals, repair and
maintains body tissues
Vitamins
A, B, C, D, K
Functions Necessary for
good health and a healthy
body, lack of a vitamin can
cause disease
Example
Minerals
Calcium, iron,
potassium
Functions Regulate body
functions, needed for
structure of body parts,
maintain good health
Example
Water
Dissolves and
transports materials in the
body which is 70% water,
needed for chemical
reactions in the body
Functions
Digestive System
Is
responsible for breaking down
food into molecules the body can
use.
Then the molecules are absorbed
into the blood and carried
throughout the body.
Finally, wastes are eliminated from
the body
Digestive System
There
are several parts:
Mouth
Pancreas
Esophagus
Large Intestine
Stomach
Small Intestine
Liver
Mouth & Salivary Glands
Function:
Physical and
Chemical breakdown of food
Physical when your teeth are
breaking down the food
Chemical the breakdown of
complex molecules into simple
(by enzymesAmylase)
Esophagus
Connects
the mouth to the
stomach
Epiglottis seals off your
windpipe, preventing the food
from entering.
Peristalsis waves of muscle
contractions- pushes food through
the to the stomach
J-
Stomach
shaped, muscular pouch
Pepsin & Protease enzyme
digests proteins
Hydrochloric Acid strong
acid helps protease, kills bacteria
Mucus coats and protects the
lining of the stomach
Small Intestines
Completes
chemical digestion,
food is absorbed and transported
to cells by blood.
Produces protease, amylase, lipase
enzymes
Long & folded increase surface
area. Tiny finger-like=villi cover
inner surface increase surface area.
Produces
Liver
chemicals needed for
digestion
Liver breaks down medicines &
produces bile
Bile breaks down fat particles &
neutralizes stomach acid
Pancreas
Triangular
shaped organ,
between stomach and small
intestines
Produces enzymes (protease,
amylase, lipase) that flow into
the small intestines
Large Intestines
½ meters long (as long as a
bathtub)
Absorbs excess water, collects
undigested food for removal
from body
1
Rectum & Anus
Rectum
short tube where
waste is compressed into
solid form
Anus waste material is
eliminated from the body