Learn all about the human body's many systems and some of its individual organs, both vital and vestigial. When you purchase through links on our site, we may earn an affiliate commission.

Various organ systems of the Human Body are Digestive System, Circulatory System, Endocrine system, Excretory System, Integumentary System, Nervous System, Respiratory System, Skeletal System and ...

An introduction to the amazing functions of the human body's nervous system. An introduction to the amazing functions of the human body's nervous system. This extremely advanced part of our ...

An average adult has 5 to 6 quarts (4.7 to 5.6 liters ... deoxygenated blood back to the heart. The system of blood vessels in the human body measure about 60,000 miles (96,560 kilometers).

When the thermometer came out of your mouth, it had to read higher than 98.6°F—the long-accepted “normal” human body ... a just-right body temperature, central nervous system sensors ...

How weird is that? To unravel the mysteries of the body we're going to group organs together by the jobs they perform, or their function. We call these organ systems or body systems. Organs are ...