[Free Registration/Login may be required to access all resource tools.] Defines respiration, looks at structures of the respiratory system, and discusses breathing mechanisms.

What do you know about the circulatory system? This site features several links to help you increase your knowledge of this fascinating human body system.

This site features a circulatory system internet workshop focused on diseases and healthy living. Students and teachers will benefit from the resources linked to this site.

Answer questions about the respiratory system.

Students estimate the number of breaths they take, then perform an experiment to find the actual amounts.

This passage explains the pressure regulation and fluid dynamics of the human respiratory. Complete a five-question quiz over the information in the passage.

Learn about the structure and function of the respiratory system organs.

Understand how some respiratory disorders affect the human body.

Fact card on severe acute respiratory syndrome, commonly known as SARS, and the serious dangers it can pose to human health.

Describes the five main approaches to the treatment of COPD.

The Med Help Support Communities provides questions and answers about most medical conditions as well as allowing you to type in a question and get a reply from a doctor.

This animation illustrates how the diaphragm and muscles around the rib cage work to facilitate inhaling and exhaling.

This resource contains over 100 animated exercise examples for weight training.

This lesson will cover the respiratory cycle by looking at inhalation and exhalation.

A series of personal interviews with people suffering from emphysema caused by smoking.

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

The fastest land mammal in the world, the cheetah (Acinonyx jubatus) has many adaptations that allow it to sprint across the plains. Its rangy frame supports long limbs and a deep chest cavity, and this species has a small waist and an...

" Ethnolinguistic Groups - Almost all inhabitants of mainland China are of Mongoloid stock, and ethnic distinctions in the country are largely linguistic rather than racial. The Han comprise nearly 95 percent of the population; the...

This site from the Cancer Index provides a long list of links to sites on every imaginable type of cancer, genes related to cancer, treatments, and resources for cancer patients and their families. The index can be viewed alphabetically,...

Explore the human body like never before. Resource presents hundreds of interactive anatomy pictures and descriptions of thousands of objects in the body.

This lesson provides an overview that explains the respiratory system in humans. It is 4 of 5 in the series titled "Animals: Human Respiratory System."

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

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."

Learn what bronchial tubes are and where they are located in this brief definition by KidsHealth.