An informative video offers a brief overview of the 11 systems in the human body. It gives a brief description of each before pointing out their interdependence. 

The human body produces about 1.7 liters of saliva a day to aid in digestion. Here is a video that explores the digestive system, highlighting the difference between mechanical and chemical digestion. Scholars then see each organ of the...

Watch as the Khan Academy explains why red blood cells are efficient carriers of hemoglobin and explains the difference between pulmonary arteries and veins. This thorough video, complete with excellent explanations and diagrams, will...

To take one step, the body uses about 200 muscles. In the video, learners see the difference between the three types of muscles found in the human body—skeletal/striated, smooth, and cardiac. The instructor then explains, in detail, how...

The average adult human brain contains 100 billion neurons. In the video, scholars learn about brain lateralization and how different portions of our brain do different things. Learners then explore neurons, learning their parts and how...

The pineal gland in the endocrine system secretes melatonin which helps humans sleep. In this human body video, scholars explore the major parts of the endocrine system. The instructor explains the roles of hormones, glands, and cells...

The video displays a diagram of the nervous system and the dialogue is a telephone conversation about how it works. While it is not particularly engaging, there are plenty of related resources that make this quite a find! From within the...

More than 27 million Americans have some type of thyroid disease. In the 24th video in a series of 47, scholars see how the hypothalamus-pituitary-thyroid axis works in the human body. The narrator then explores what happens to the body...

Humans can sense about 10,000 different odors. Young scientists explore how humans interpret the world around them using their senses. The instructor reminds learners of action potentials and the nervous system and then focuses on three...

The human reproductive system contains the largest (egg) and smallest (sperm) cells in the human body. It's time for scholars to review the differences between asexual and sexual reproduction. The instructor reminds them how meiosis...

You will shed approximately 40 pounds of skin cells in your lifetime—wow! Scholars first learn about the multiple functions of our skin, both the epidermis and the dermis, and its role as a covering for the human body. The video then...

Adults' bodies are made of 206 bones, whereas babies have about 300 different bones or areas of cartilage. Pupils explore the difference between exo- and endo- skeletons in a video about the skeletal system. They then see how bones are...

The thinnest skin on your body is found on your eyelids, and the thickest is found on the soles of your feet. This seventh video in a series of 47 explores how the integumentary system protects people and also helps them interact with...

Though UV radiation can damage skin, it isn't all bad. The third installment in a six-part series allows the class to study the structure and function of skin. They learn about the different types of skin cancer and the SPF rating...

Most animals that show a paw preference are split 50/50 with half of the population preferring one side and the other half preferring the other, yet in humans only 10 percent are left-handed. The video explains what part of the brain...

In an emergency, your brain works overtime to process more information in a smaller amount of time, almost as if you were slowing time down. The job of a firefighter requires this kind of fight-or-flight response and quick thinking. The...

Epithelial tissues plays a variety of roles in the human body, including covering, lining, making a barrier, protection, excretion, filtration, absorption, and sensation. The video teaches high schoolers about epithelial tissue and its...