In this animated activity, learners explore three major methods of heat transfer and practice identifying each.

In this learning activity you'll review how every protein molecule of an organism is synthesized by that organism in a prescribed process. This activity helps students understand the fundamental life process of making protein.

In this animated and interactive object, learners identify the valves and chambers of the heart.

In this animated object, learners examine neutral fats, phospholipids, and cholesterol. The molecular formula and general function for each are shown.

In this learning activity you'll examine force, mass, and acceleration to understand this "Law of Acceleration."

In this learning activity you'll study the structure of the cell membrane and construct it using the correct molecules.

Learners examine what defines a fungus and read how fungi differ from animals and plants.

In this animated and interactive object, learners examine the structure and functions of granulocytes and agranulocytes. Two exercises complete the activity.

In this animated and interactive object, learners examine ventilation, external and internal respiration, and gas transport.

In this interactive learning activity, learners review the terms used to describe relative position of body parts in order to have a common set of words to describe their position.

In this animated object, learners read an introduction to protein structure and function.

In this animated and interactive object, learners examine the red blood cell's life cycle and function. A brief exercise completes the activity.