In this video learners view the valves and chambers of the heart.

In this animated activity, learners view the pathways and functions of the fasciculus gracilis and the fasciculus cuneatus.

In this interactive object, learners examine the structure and function of the sense of taste.

In this animated activity, learners examine the two major phases of cell division: mitosis and cytokinesis.

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

In this animated object, learners are introduced to the structure and function of animal cell organelles.

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

In this animated object, learners view molecules as they collide and move between two different solutions. They also observe what happens when the temperature of the solutions is raised or lowered.

In this animated activity, learners examine muscle cell contraction and relaxation and consider the role of calcium ions.

In this animated object, learners examine water molecules moving through a semipermeable membrane.

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

In this screencast, learners examine hearing and balance. Detailed drawings of the outer, middle, and inner ear structures are included.

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 interactive and animated object, learners read a description of the number, name, and function of the cranial nerves. A matching quiz completes the activity.

In this animated object, students observe how ATP energy is used to move substances across the cell membrane from an area of lower concentration to an area of higher concentration and when something too large needs to get in or out of a cell.

In this animated and interactive object, learners examine how blood flows through the heart and lungs. A brief quiz completes the activity.

Learners examine the function of each part of a microscope and follow step-by-step instructions on how to focus on a specimen. They also review the proper use and care of a microscope and test their knowledge in two drag-and-drop exercises.

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

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

In this animated object, learners read a brief description of the roles of the hypothalamus, emotions, and adrenal secretions during the stress response.

In this animated object, learners examine the major events that occur at the neuromuscular junction.

In an interactive exercise, learners identify the human body sites that harbor a normal resident flora and the sites that are sterile.

Explore what proteins are, their structure, and their functions.

In this interactive object, learners read the definitions of the parts of a cell and assemble a basic eukaryotic cell in a drag and drop exercise. A matching quiz involving cell terms and their definitions completes the activity.

In this animated object, learners examine the eight cranial bones, the fourteen facial bones, and the ribs.