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Homeostasis
Process by which an
organism’s internal
environment is kept
stable in spite of
changes in the
environment.
skeletal systemmade of bones
which are organs
that grow and
develop.
Functions of the skeletal system
•
•
•
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Provides shape and support.
Enables you to move.
Produces blood cells.
Stores minerals and other materials until
your body needs them.
• Protects your organs.
Muscular System- Works with the
skeletal system to help you move.
Types of Muscle
• Skeletal- Attached to bone
Voluntary
• Smooth- Inside organs
Involuntary
• Cardiac- Found in your heart
Involuntary
Muscles
• Voluntary- Under your
control
• Involuntary- Not
under your control
Example- muscles
attached to your
bones
Example- muscles in
your organs
• Muscle cells can only contract not extend.
• Muscles work in pairs. When one muscle
contracts the other relaxes to its original length,
Skin
Has two layers: Dermis and Epidermis
Functions:
• Protects the body.
• Maintains Temperature.
• Eliminates Waste.
• Gathers information.
• Produces vitamin D
Nutrients
• Carbohydrates- Provide Energy
• Fats- Provide Energy
• Protein- Needed for tissue growth and
repair.
• Vitamins and Minerals-Needed for
chemical reactions.
• Water- Vital processes take place in water.
Vocabulary
Using your textbook, define the following
words:
Digestion
Absorption
Mechanical Digestion
Chemical Digestion
Peristalsis
Enzyme
Digestive System
Functions:
• Breaks down food into molecules the body
can use.
• Absorbs nutrients into the blood.
• Eliminates Waste.
Organs and functions of the digestive
system
• MouthMechanical digestion- Teeth grind food.
Chemical digestion- saliva breaks down food.
• Esophagus- Muscular tube that connects the
mouth to the stomach.
• Stomach
Mechanical digestion- churning motion
Chemical digestion- chemicals and acid breaks
down and digest protein in food.
Organs and functions of the digestive
system
• Small intestine- Most of the chemical
digestion and absorption (villi) occurs.
• Large Intestine-Water is absorbed and
waste is discarded.
• Liver- Produces bile
• Gallbladder- Stores bile and releases it
into the small intestine.
• Pancreas- Produces enzymes and
releases them into the small intestine.