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Structures and Function of Body Systems
Lessons One: Levels of Organisation
Kerboodle Pages 26 - 27
What is a multicellular organism?
An organism made up of lots of cells.
Put these levels of organisation in order starting
with the smallest
Cell, tissue, organ, system, organism
Organ, cell, organism, tissue, system
What is a tissue?
What is an organ?
What is a system?
Lesson Two: Gas Exchange
A group of cells that work together to perform a
certain function
A group of tissues that work together to perform a
certain function
A group of organs that work together to perform a
certain function
Kerboodle Pages 28-29
Name three organ systems
Choose from:
Circulatory
Respiratory
Reproductive
Digestive
Skeletal
Muscular
What is gas exchange?
When you breathe in oxygen and breathe out
carbon dioxide
Label this diagram
What happens in the alveolus?
Oxygen diffuses into the blood
What is respiration?
A chemical reaction that releases energy
Why can you see your breath when you breathe on We breathe out water that condenses on the
a cloud mirror
mirror
Lesson Three: Breathing
What happens when we breathe in?
Kerboodle Pages 30 - 31
Ribs move up and out
Diaphragm contracts – moves down
Volume of the chest increases.
Pressure decreases so gas rushes in.
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What happens when we breathe out?
What can increase lung volume?
What can decrease lung volume?
Lesson Four: Skeleton
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Structures and Function of Body Systems
Ribs move down and in.
Diaphragm relaxes – moves up.
Volume of the chest decreases.
Pressure decreases so gas rushes out
Exercise
Smoking
Lung diseases such as asthma
Old age
Kerboodle Pages 32-33
How do you keep your bones healthy?
Exercise and a healthy diet.
Give four functions of the skeleton
Support the body
Protect vital organs
Helps the body move
Makes blood
In the bone marrow
Where is your blood made?
Lesson Five Movement: Joints
Kerboodle Pages 34-35
State what a joint is.
Where two or more bones join together.
Name three types of joints.
Hinge joints
Ball and socket joints
Fixed joints
Cartilage covers the end of a bone and stops bones
rubbing together.
Ligaments hold bones together.
State what cartilage is
What do ligaments do?
Lesson Six Movement: Muscles
Why is a muscle a tissue?
Why are muscles antagonistic?
How do you bend your arm?
Kerboodle Pages 36-37
Lots of muscles cells work together to cause
movement.
They work together but in the opposite directions.
One muscle contracts and the other relaxes
The bicep contracts and the triceps relaxes