The brain does not feel pain, which is why surgeons can perform brain surgery without anesthesia or while the patient is awake. Pupils see how the peripheral nervous system allows humans to feel pain. The narrator explores the afferent...

Once a nerve cell is damaged, it cannot be reproduced. Video number two in a series of 47 introduces high schoolers to tissues, focusing on the four types: nervous, muscle, epithelial, and connective. The narrator teaches their...

Humans have 54 bones in their hands, fingers, and wrists, allowing for a variety of movement. The 19th video in a series of 47 introduces learners to the anatomy of the skeletal system. The narrator teaches about flat, short, and...

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...

Teach your class about human blood and explain why donation is so important using the 29th video in a series of 47. Learners explore the basic components of blood, how cuts stop bleeding, and how antigens determine blood types. 

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...

The narrator of this short video breaks down synapses and how they work in video number 10 in a series of 47 about the human body. It specifically focuses on electrical and chemical synapses and how they work, and ends by exploring...

Humans use 200 muscles to take one step — that's a lot of muscles! Learners see how skeletal muscles work to pull on bones, creating movement. The narrator then explores motor units, muscle twitches, impulses, contractions, and isotonic...

The 37th video in a series of 47 about the human body delves into metabolism. Scholars review cellular respiration and see how it, ATP, and glycolysis play a role in metabolism and how all of this relates to sugar levels in the body. 

A short video offers a simple, yet engaging, explanation of the theory of evolution using amoebas as an example. The narrator uses the example of the evolution of dog breeds as an example of how humans can influence the course of change.

Would you rather having biting flies or chocolate? The question may seem absurd, but cocoa trees rely on pollination from biting flies. Viewers come to understand the importance of pollinators to our food supply, flowers, and entire...

Ligers grow at a rate of 2.2 pounds every second day, thus by the end of their first year, they can weigh up to 364 pounds. Ligers are the subject of a video the looks at hybrids and shows viewers how speciation can occur via...

Coral reefs cover less than one percent of the ocean floor, yet more than 25 percent of marine life lives in coral reefs. A colorful, engaging video describes the health of coral reefs and why the formations matter. The first lesson in a...

Paul Andersen compares your endocrine system to Facebook and your nervous system to Gmail in order to show the differences in response time. He then delves into specifics of your endocrine system, talking about hormones that are water...

This lesson has gone viral ... literally! An animation video describes how a single virus cell gives rise to a multitude of progeny viruses. Learners explore how a virus infects many cells in a short amount of time.

One cloning technique is somatic cell nuclear transfer (SCNT). Observe the process in action through an animated video. Review the applications of the process for both therapeutic cloning and cloning of an individual.

Understand the structure and function of the reproductive system. [6:38]

The first of a four part series about human reproduction beginning with the female reproductive system. [10:15]

This exploration of human reproduction continues with a look at testicular anatomy, the steps of sperm production, and how it's influenced by gonadotropin and testosterone. [10:44]

A video that discusses the 11 organ system of the human body. Learn some basic information about the circulatory, digestive, endocrine, excretory, integumentary, lymphatic, muscular, nervous, reproductive, respiratory, and skeleton...

Overview of fertilization and early human development, from conception leading to a zygote to blastocyst, embryo and fetus. [7:59]

This lesson will introduce the female reproductive system as well as give an overview of the organs and glands associated with the female reproductive system. It is 2 of 5 in the series titled "Female Reproductive System."

Learn about the structure and function of egg and sperm fertilization. [11:35]

This slideshow helps you discover the beginning of embryonic development and how it is fertilized, how it grows, and how it, in turn, becomes a pregnancy. [2:18]