This lesson provides an overview that explains the respiratory system in humans. It is 3 of 5 in the series titled "Animals: Human Respiratory System."

Simple labeled diagram of the parts of the human respiratory system.

Resource provides two good diagrams of a bird's respiratory system.

respiratory system

This lesson will introduce the 11 organ systems of the body, giving a brief overview of their function. It is 2 of 2 in the series titled "Organ Systems."

This lesson will introduce the 11 organ systems of the body, giving a brief overview of their function. It is 1 of 2 in the series titled "Organ Systems."

Hundreds of anatomy diagrams for classroom or medical use. Each image represented is a simple black-and-white professional drawing of a specific part of the human body.

This site from Innerbody.com has an illustration as well as detailed text explaining the function of the Diaphragm. See Images - Diaphragm and Descriptions - Diaphragm

This site features a detailed index of photographs for cardiovascular pathology. You can see what a normal human heart looks like and what a sick one looks like too. Come and check it out.