contains the digested food and other elements by which the body is
nourished.


SUMMARY.

1. The blood contains very small objects called blood corpuscles.

2. There are two kinds of corpuscles, red and white.

3. The red corpuscles carry oxygen.

4. The white corpuscles repair parts that are worn.

5. The corpuscles float in a clear, almost colorless fluid, which
nourishes the body.




CHAPTER XI.

WHY THE HEART BEATS.


~1.~ If you place your hand on the left side of your chest, you will
feel something beating. If you cannot feel the beats easily, you may run
up and down stairs two or three times, and then you can feel them very
distinctly. How many of you know the name of this curious machine inside
the chest, that beats so steadily? You say at once that it is the heart.