Online College Courses for Credit

2 Tutorials that teach Skeletal Health
Take your pick:
Skeletal Health

Skeletal Health

Author: Sophia Tutorial

This lesson will describe the effects that exercise and nutrition have in the health of your skeletal system.

See More

What's Covered

In this lesson, we’ll discuss skeletal health by looking at:

  1. Review of Homeostasis
  2. Effects of Diet and Exercise

1. Review of Homeostasis

Exercise effects bone remodeling by increasing the amount of calcium deposited into bones. To illustrate that, we’ll first review the concept of homeostasis in bone remodeling.
Recall that if blood calcium levels are too high, calcium will then be deposited into bones. The bones will be built stronger and denser by a cell called an osteoblast. Conversely, if calcium levels in the blood are too low, a cell called an osteoclast will remove calcium from the bone and deposit it into the blood to help maintain the blood calcium level. Remember, proper blood calcium levels are necessary for the nervous system and muscular system to function properly.

Big Idea

Calcium has a large effect on how healthy our bones are. The more calcium that's deposited into our bones, the better, because it makes those bones stronger and more dense.

Terms to Know

  • Bone remodeling
  • The process in which calcium is recycled between the blood and bones
  • Calcium
  • A mineral necessary for the proper development and mineralization

2. Effects of Diet and Exercise

As mentioned at the beginning of this lesson, exercise increases the amount of calcium deposited into bone. In other words, as we exercise, more calcium is deposited into bone than is withdrawn. Again, this will help bones become stronger and denser.

In addition to exercise, diet can also have an effect on the density of our bones. A diet that's high in calcium will obviously be better. Bones will be stronger because that calcium will be deposited into them.
People who don't exercise, or maybe don't have a diet that's high in calcium, can run the risk later in life of developing diseases like osteoporosis, which occurs when the bone density levels decrease significantly. People who don't have very strong or dense bones are also at a greater risk of breaking or fracturing their bones.

Big Idea

By exercising and having a diet high in calcium, you are helping your bones to become stronger and denser, avoiding the potential of different diseases later in life.


In this lesson, you reviewed the process of homeostasis in bone remodeling. This is when calcium is either deposited into or removed from the bones based on the body’s blood calcium levels. You then learned about the effects that exercise and nutrition can have on your skeletal system. The combination of exercise and a calcium-rich diet can help your bones become stronger and denser, decreasing your risk of developing diseases like osteoporosis.
Keep up the learning and have a great day!