This 1930s educational film provides a detailed exploration of the respiratory and excretory systems, combining live-action demonstrations, animations, and intertitles to illustrate human anatomy and ...

The trachea, also called the windpipe, is part of the passageway that supplies air to the lungs. Any prolonged blockage, even for a few minutes, can cause death. The trachea is about 4.5 inches long ...

An organ is a group of tissues that work together to perform a specific task in the body, such as digesting nutrients or producing chemical messengers that enable brain cells to communicate. Although ...

Most people have 24 ribs, with 12 on each side of the body. No evidence indicates any difference between males and females. The ribs and rib cage are excellent examples of the human body’s ...