The New Childrens Encyclopedia

THE HUMAN

BODY

Which organs are

these?

Find out on page 287

How fast

do nerve

impulses travel?

Find out on page 281

At rest, a child’s heart beats about 85 times a minute.

The left lung is slightly smaller than the right lung.

A human being takes about 23,000 breaths each day.

There are about three million pain sensors in a human body. Most are in the skin.

Your ears will grow about

1

⁄ 4 in (6.55 mm) in 30 years.

THE HUMAN BODY