Share 1.3 Growing Bones
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True or False: Babies have more bones than adults.
True
True or False: Bones stop growing when you are 50 years old.
False - they stop between 20 and 25
Which material in a baby's body is soft and flexible?
Cartilage
What mineral is very important for building healthy bones?
Calcium
How many bones does an adult skeleton have?
206
According to the text, name two body parts made of cartilage.
Ear and nose
True or False: Our skeleton grows as we grow.
True
How many bones does a baby have when it is born?
More than 270
What happens to cartilage as a baby grows older?
It is replaced by bone
At what age does the skeleton usually reach its full size?
Between 20 and 25
What kind of special "photograph" is used to see bones?
An X-ray
What word is used when bones "grow together" to form one bone?
Fuse
Look at the 1-year-old hand X-ray. Are the bones touching or far apart?
Far apart / have gaps
Why is calcium especially important for young children?
To build healthy bones
Compare the 1-year-old and 20-year-old X-rays. Which hand is larger?
The 20-year-old hand
In the X-rays, do the wrist bones look more "solid" in a 3-year-old or a 13-year-old?
13-year-old
