The Human Body
The human body is amazing. Scientist are continuing to discover more about this complex organism.
- The brain of an adult human weighs around 3 pounds. This is just 2% of the body’s weight, but it requires approximately 20% of the body’s total energy demands.
- If all the blood vessels were lined up end to end, the total length would be approximately 25,000 miles
Listed on this page are some videos that will help you learn more about the amazing human body.
View videos from Khanacademy.org
Chromosomes, chromatids, chromatin, etc.
Heredity and genetics
Human anatomy & physiology