Chapter 1:
Bones and Muscles
Science P4
Harapan Prestasi Primary School
By : Florita Mella Rosalia
Lessons:
A
B
C
Bones and the
Skeleton
Muscles and
Movement
Animals and
Skeletons
Group Work:
1.
How many bones are there in rib cage?
2.
What is the longest bone in human skeleton?
3.
Look at the chart :
Answer Group Work:
1.
How many bones are there in rib cage? 24 bones
2.
What is the longest bone in human skeleton? femur
3.
Look at the chart :
Yasmin
Luisa
Josie
When someone is getting older, the bones are longer.
Student’s Book pg. 12-15
B
Muscles and
Movement
• Describe how muscles help bones move
• Describe the importance of movement in maintaining human health.
How do muscles work?
•
Bones cannot move by themselves.
They need muscles to move.
•
Some our muscles are joined to the
bones. These muscles are skeletal
muscles.
•
Muscles work in pairs to make the
bones move.
Watch the video:
https://drive.google.com/file/d/1xyUNh5o6eMGAo6FvXBOkghXI0Co6IRR8/view?usp=sharing
How do muscles work?
When our biceps contract
When our triceps contract or
or shorten, they pull up the
shorten, they pull down the
bone in our lower arm. This
bone in our lower arm. This
allows our arm to bend.
allows our arm to straighten.
What can you do to be healthy?