How to share this Lesson/Activity with your Google Classroom:
- To share this lesson/activity with Google Classroom, click "Continue with Google" to get started.
- After logging in, click "Add to Google Classroom" to assign this lesson/activity to your students.
Read the Following Selection
Read the following selection, or click on the play button below to listen aloud.
Your skeleton is your body’s framework. This means it gives your body shape. It helps support different parts of your body. It helps protect what is inside your body, such as your lungs. Think about what your body would be like without a skeleton.
Your skeleton is made up of many different bones. These bones work together so you can move in many different ways. So it is important that your bones are healthy.
How Bones Change
Your bones are a living part of your body. When you were born, you had about 300 bones. Some baby bones are made from cartilage. Other baby bones are partly cartilage. Cartilage is softer than bone. That is why babies are so flexible. They can move their bones in ways that adults cannot. As a baby grows, the cartilage is replaced by bone, and some of the bones grow together. At around the age of 25, a person’s bones stop growing. At that age, the adult skeleton has 206 hard bones.
Calcium and Bones
Calcium is a mineral. It is what helps bone grow to replace cartilage. It helps make bones strong. Calcium is very important when you are growing. Because bones grow for a long time, it is important for children and teenagers to get all the calcium they need. The most common source of calcium is milk. You can also get it from other dairy products such as cheese and yogurt. Calcium is also in dark green vegetables such as broccoli and kale. Some foods have calcium added to them. These are called calcium-fortified foods.
For calcium to work in your bones, it needs vitamin D. Your skin makes vitamin D when it is in sunlight. A small amount of vitamin D is found in fish such as salmon or tuna. Some foods, such as milk, are fortified with vitamin D.
Activity and Bones
Parts of your body, such as muscles, become stronger with exercise. Bones also get stronger with the right activity. The best activities to make bones stronger are called weight-bearing activities. These are activities in which you work against gravity, for example, walking, hiking, playing tennis, and lifting weights. Swimming and bicycling are good exercise, but not for your bones.
Many doctors think that the right exercise is just as important for making strong bones as calcium is. So make sure you get enough calcium and do the right activities for your bones. They have to last a lifetime.
Now, show what you know!
Complete some questions about the reading selection by clicking “Begin Questions” below.
0 of 5 questions completed
You have already completed this activity. You cannot start it again.
Activity is loading…
You must sign in or sign up to take this activity.
You must first complete the following:
0 of 5 questions answered correctly
Time has elapsed.
You have reached 0 of 0 point(s), (0)
Score: of ()
0 Essay(s) Pending (Possible Point(s): 0)
1.The author says that bones are a living part of your body.
What proof does the author give that they are alive?CorrectIncorrect
2. What does the word flexible mean?CorrectIncorrect
3. Explain why the number of bones in your body changes from 300 when you are a baby to 206 when you are an adult.
Great answer!Great answer!
Type your response above.
4. Climbing stairs and running are weight-bearing activities.CorrectIncorrect
5. Fill in the blank using information from the text.
Foods that have calcium added to them are called foods.