DNA Replication
Step through how a DNA strand unwinds and copies itself.
Open toolEcosystem Diagram
Visualize energy flow between producers, consumers and decomposers.
Open toolFood Web
Map feeding relationships across a sample ecosystem.
Open toolGene Expression
See how DNA is transcribed and translated into proteins.
Open toolHuman Brain
Explore the brain's major regions and what each one controls.
Open toolHuman Ear
Trace how sound travels through the outer, middle and inner ear.
Open toolHuman Eye
See how light passes through the eye to form an image.
Open toolHuman Heart
Follow blood flow through the heart's four chambers.
Open toolInteractive Cell
Click through organelles inside a labeled animal cell.
Open toolInteractive DNA
Rotate and explore the double-helix structure of DNA.
Open toolMeiosis Diagram
Walk through each stage of meiosis I and meiosis II.
Open toolMitosis Diagram
Walk through each phase of cell division.
Open toolNervous System
See how the central and peripheral nervous systems connect.
Open toolNeuron Diagram
Label the parts of a neuron and how signals travel.
Open toolRespiratory System
Follow air from the nose down to the lungs and back.
Open tool