In this animated object, learners examine the formation of ester bonds in the synthesis of lipids using triglyceride biosynthesis as an example. Ester bond formation is described as a dehydration synthesis reaction.

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

In this animated and interactive object, learners examine the location, structure, and function of the juxtaglomerular (JG) apparatus.

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

In this interactive object, learners examine the locations of major body cavities and their protective membranes. A drag-and-drop exercise completes the activity.

Learners read about the mutations that occurred in plants for the successful transition from an aquatic to a terrestrial existence. The classification of plants is based on these adaptive structures.

In this animated learning object, learners examine the regulation of inducible operons in bacterial systems.

Students choose the hypothesis and practice describing bacterial colonies using the steps of the scientific method.

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

In this animated and interactive object, learners read about the parts of the eye. A short quiz completes the activity.

In this animated object, learners trace the olfactory pathway from the nasal cavity to the olfactory cortex.

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

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 various connective tissue layers of the muscle organ. The terms "prime mover," "synergist," "antagonist," "origin," and "insertion" are defined.

In this interactive object, learners examine the neuron pathway into and out of the spinal cord. They complete the activity by testing their knowledge of vocabulary and the location of spinal cord structures.

Learners examine the location, structure, and function of the unipolar and multipolar neurons.

In this animated object, learners examine the function and location of the motor neurons and the damage that can result when they are injured.

Learners play a vascular system "game" to identify the arteries, capillaries, and veins that make up the renal blood supply pathway. A score is given at the end of the activity.

Learners read a brief description of the vertebral column and examine the distinctive features of the cervical, thoracic, and lumbar vertebrae.