Transcript nervous system

Systems in Animals
Main Idea
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Different body systems help animals carry out
basic life functions.
Skeletal system
Muscular system
Nervous system
Respiratory system
Circulatory system
Excretory system
Digestive system
What is a system?
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A system is a group of parts, people, things
that work together.
Example: The school system. How does it
work?
For what we will be talking about is a system
of body parts in an organism.
Can you name a system in your body?
Can you name a system that has nothing to do
with science.?
Chapter Overview
Animals have different organ systems.
 By the end of this chapter you will be
able to answer these questions:
 How do animals move and sense
changes? (Hint: 3 systems)
 How do air and blood travel in the body?
(Hint: 3 systems)
 How food is broken down?(Hint: 1
system)
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How do animals move and sense
changes?
Through these three systems:
 The Skeletal system /bones
 Muscular System
/muscles
 Nervous System
/nerves
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Animals use skeletal and muscular
systems to move. The nervous system
can sense and respond to changes.
How do air and blood
travel in the body?
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Through these three systems:
The Respiratory System / oxygen, lungs, breathing
The Circulatory System / heart, blood, going through
your body
The Excretory System / removes waste, throws out
the trash
The circulatory and respiratory systems transports
or moves blood and oxygen. The excretory system
removes waste or throws out bad stuff for your body.
How is food broken down?
Through this system:
 The Digestive System /
 food goes in, body takes the good stuff
from the food, food goes out.
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The digestive system breaks down food
so animals can get the energy they need.
The Skeletal System
Bones made of living tissue
 Supports body (Helps you stand)
 Protects soft body organs (like a shield)
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The Skeletal System
The Muscular System
The Muscular System
Made of strong tissue called muscles.
 Vertebrates move when muscles shorten
and pull on bones.
 Invertebrates move by tensing muscles
and relaxing.
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Nervous System
Made of nerve cells
 The nerve cells join together to become
nerves
 Controls all the body systems
 System has brain, nerves, spine
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Nervous System
Respiratory System
Respiratory System
Brings oxygen to the blood and removes
waste gas.
 Small invertebrates do not have this!
(ex: Worms)
 Lungs, gills
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Circulatory System
Move blood around body
 Carries oxygen, water, and food to blood
cells.
 Heart, blood vessels, and blood
Heart is made up of strong muscle tissue.
 Fish has 2 chambers in their heart
 Amphibians 3 chambers in their heart
 Mammals 4 chambers in our hearts.
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Circulatory System
Excretory System
Removes waste/ throw out trash
 Liver, kidney, bladder, skin, lungs
a. Liver and kidney filter waste from the
blood
b. Skin sweats excess (too much)
minerals
c. lungs, gills remove waste gas
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Excretory System
Digestive System
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Breaks down food
 Animals digest food in different ways
a. Sponge turns food into tiny pieces (small
particles)
b. Simple invertebrates eat food and throws out
waste from the same opening.
c. Segmented worms eat in one hole and
comes out of the tail. (2 openings)
Digestive System
d. Reptile, amphibian have a more
complex digestive system.
e. Mammals also have a complex
digestive system that breaks down food
for the blood to take.
Digestive System