Learn here all about how the integumentary system functions: such as protecting the body from invasion by microorganisms, chemicals, and other environmental factors; preventing dehydration; acting as a sensory organ; modulating body...

Describes the different parts of the nervous system and how it is organized.

Despite the title of the page, this site explores the entire integumentary system, including skin, hair and nails. Content also includes the cutaneous sensory and cutaneous vascular systems, pigmentary system, sweat glands, sebaceous...

By the end of this section, you will be able to explain the concept of pressure in the human body; explain systolic and diastolic blood pressures; and describe pressures in the eye, lungs, spinal column, bladder, and skeletal system.

Systems thinking is an important concept across the Earth sciences. In this game, students either are a part of a system or serve as scientists tasked with observing and making sense of the system moving in front of them.

Students can learn about the human skeletal system through this easy-to-access tutorial. Sections include an introduction, organization of the skeleton, appendicular skeleton, and the axial skeleton. Interactive quizzes for each section...

All of the organ systems of your body are interdependent, and the skeletal system is no exception. The food you take in via your digestive system and the hormones secreted by your endocrine system affect your bones. Even using your...

For most of history, scientists weren't quite sure why our hearts were beating or even what purpose they served. Eventually, we realized that these thumping organs serve the vital task of pumping clean blood throughout the body. But how?...

By the end of this section, you will be able to define net force, external force, and system; understand Newton's second law of motion; and apply Newton's second law to determine the weight of an object.

This site from the Department of Chemistry at the Washington University provides a deetailed study of the role of hemoglobin in blood physiology. The article is somewhat in-depth, complete with pictures, charts, and a bibliography.

Article describing the scope of the problem of overfishing in the ocean and in fresh water bodies around the world. Adverse effects of this practice on both natural and human systems, and efforts to contain it are detailed. (Published:...

Study the many parts of the human body that make up the sensory systems. Be able to identify receptors, primary sensory coding, neural pathways and more with this biology resource.

Students can learn about the human respiratory system's structures and functions through this easy-to-access tutorial. Sections include major zones and divisions, the nose and nasal cavity, the pharynx, the larynx, the trachea and...

This site from The Galileo Project of Rice University provides this discourse on the Ptolemic System that attempted to explain the motion of heavenly bodies. Pictures, charts, and links are all provided for additional information.

The Engineering and the Human Body unit covers the broad spectrum of topics that make up our very amazing human body. Students are introduced to the space environment and learn the major differences between the environment on Earth and...

Students use this module to learn about the barrier defenses and the immune defense functions of the human body.

This study guide on the immune system covers key terminology and the different lines of defense the human body has to protect itself against pathogens. It is available for download with free registration.

This is an in-depth look at sprains of the Medial Collateral Ligament, the ligament located on the innermost part of the knee which connects the bones of the leg and offers stability to the knee.

This site from Harvard University offers a rating system of diagnosing Parkinson's Disease. It also presents the Unified Parkinson Disease Rating Scale (UPDRS) which measures mentation, behavior and mood, activities in daily life and...

Article presents an in-depth overview of oxidative phosphorylation which provides most of the ready chemical energy (ATP) used by the cells in your body.

Brain cells called neurons send information and instructions throughout the brain and body. The information is sent via electro-chemical signals known as action potentials that travel down the length of the neuron. These neurons are then...

In this lesson students will learn the basics about the skeletal system. They will be able to identify the major bones of the human body and explain the functions of the skeletal system. The students will have the opportunity to navigate...

Summarizing research found at the Mayo Clinic, this article explains why kids, who have only smoked a few cigarettes, "experience the same symptoms of nicotine addiction as adults who smoke heavily." Learn about how nicotine affects the...

Booklet by the Environmental Protection Agency. Covers physical effects on major body systems, as well as emotional impacts. Lengthy, but well indexed.