Choose. The Solar System

Choose the correct answer to each question: What is there between Mars and Jupiter? Where does the geocentric theory say that the Earth is located? How are the orbits of planets different from those of…

Reflect. A democratic system

Was the English parliamentary system a true democracy? Explain your answer.

Solar System & Planets

A video full of fun and exciting facts about our Solar System.

Heart and Circulatory System

The heart and circulatory system (also called the cardiovascular system) make up the network that delivers blood to the body's tissues.

Female Reproductive System

Find out about the female reproductive system. interactive anatomy diagrams illustrate the function of the reproductive organs, from fertilization to birth.

The Circulatory System

Answer. The nervous system

What are the two main parts of the nervous system? What are nerves? How do they work?

The fallow system

In the first year: half of the fields were left fallow to let the soil recover. The other half was farmed. In the second year: the fallow fields from the first year were farmed and the other fields were…

Identify. The respiratory system

Write the name of each part of the human respiratory system next to the correct number:

Male Reproductive System

Male Reproductive System. Learn all about male reproductive organs and surrounding body parts using interactive human anatomy pictures and definitions.