Explains what happens during embryogenesis, the first eight weeks of pregnancy.

Understand the egg cells, and how they develop into a human being.

This lesson focuses on cloning. Plants can make identical copies of themselves by asexual reproduction, for example by tubers and runners. Humans have been cloning plants for years and have recently started to develop techniques to clone...

Yogi Berra said "You can observe a lot by just watching." In this human biology science fair project, you will observe how your eyes perceive color by watching afterimages. Afterimages are what you see after staring at an object for...

With these learning exercises, students explain the advantages of the human adaptive immune response over the innate immune response including the types of T cells, development, and their functions.

Students learn about the development of immunological competence, and find out about the human body's immune response.

After studying this article, students will be able to identify the functions and structure of bones, types of bones, bone development, parts of bones, types of joints, and bone disorders.

[Free Registration/Login may be required to access all resource tools.] The sperm and egg don't look anything like a human baby. After they come together, they will develop into a human being. How does a single cell become a complex...

The DNA in our cells contains our "blueprints," but it's the proteins in our cells that do most of the work. The Human Genome Project has allowed us to start reading the blueprints, but we still don't understand what most of the proteins...

Although it is happening every hour of every day, all over the world, the story of egg meeting sperm is still a tale worth telling. Millions of candidates set off on a long and perilous journey with a single target at the end, and if the...

Self-guided learning activity where students learn about the structure and function of the male and female reproductive systems. There is a short quiz at the end of the lesson to check for understanding.

Students read through a complete, interactive lesson on biotechnology. An activity at the end allows students to research and present arguments for or against statements about the ethics of gene therapy and gene manipulation.