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  • Human Biology and Health

Browse by Grade & Topic: Human Biology and Health

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Frog Dissection

  • New!

Use a scalpel, forceps, and pins to dissect realistic male and female frogs. Organs can be removed and placed into organ system diagrams. Once the dissections are complete, the frog organ...

Lesson Info Launch Gizmo

Circulatory System

Trace the path of blood through a beating heart and the network of blood vessels that supplies blood to the body. Take blood samples from different blood vessels to observe blood cells and...

Lesson Info Launch Gizmo

Digestive System

Digestion is a complex process, involving a wide variety of organs and chemicals that work together to break down food, absorb nutrients, and eliminate wastes. But have you ever wondered...

Lesson Info Launch Gizmo

Senses

  • New!

Everything we know about the world comes through our senses: sight, hearing, touch, taste, and smell. In the Senses Gizmo, explore how stimuli are detected by specialized cells, transmitted...

Lesson Info Launch Gizmo

Muscles and Bones

  • New!

FREE with no time limit!

See how muscles, bones, and connective tissue work together to allow movement. Observe how muscle contraction arises from the interactions of thin and thick filaments in muscle cells. Using...

Lesson Info Launch Gizmo

Human Homeostasis

Adjust the levels of clothing, perspiration, and exercise to maintain a stable internal temperature as the external temperature changes. Water and blood sugar levels need to be replenished...

Lesson Info Launch Gizmo

Diffusion

  • Stem Case

As a physician assistant, students must learn about diffusion to save the life of a person poisoned by chlorine gas that was released into a small town following a train crash.

Lesson Info STEM Cases

Homeostasis

  • Stem Case

In the role of a physician assistant, students help a young man, named Anthony, who has Type II diabetes and high blood pressure. Students must make a diagnosis and then must apply the...

Lesson Info STEM Cases

Enzymes

  • Stem Case

As a veterinary technician, students learn about enzymes to help a dog that has been eating normally but is losing a lot of weight.

Lesson Info STEM Cases

Meiosis

  • New!

Explore how sex cells are produced by the process of meiosis. Compare meiosis in male and female germ cells, and use crossovers to increase the number of possible gamete genotypes. Using...

Lesson Info Launch Gizmo

Embryo Development

  • New!

Explore how a fertilized cell develops into an embryo, a fetus, and eventually an adult organism. Compare embryo development in different vertebrate species and try to guess which embryo...

Lesson Info Launch Gizmo

Meowsis

  • Stem Case

As a geneticist in an animal hospital, students learn about genetic changes in meiosis to determine the reason why a male cat can have calico fur coloring.

Lesson Info STEM Cases

Evolution

  • Stem Case

Working as a CDC researcher, students investigate an outbreak of multi-drug resistant bacterial infections and determine how evolution was involved by tracing the source and cause of the...

Lesson Info STEM Cases

Cell Respiration

  • Stem Case

As a medical toxicologist, students learn about cell respiration to save the life of a CIA agent that has been poisoned.

Lesson Info STEM Cases

Osmosis

  • Stem Case

As a veterinarian, students help a young calf, named Clark, who is having seizures. To determine the cause, the students fly into Clark's brain to learn about osmosis and apply their...

Lesson Info STEM Cases

Nitrogen Cycle

  • Stem Case

An infant on a farm has blue baby syndrome. As an EPA environmental engineer, students must find the cause of the baby's illness. Using environment data, students learn the importance of...

Lesson Info STEM Cases

Protein Synthesis

  • Stem Case

As a pediatrician, students learn about genes and protein synthesis to try to help a baby girl named Lucy who has an immunodeficiency disease.

Lesson Info STEM Cases

Drug Dosage

A drug prescription must be carefully planned to maximize benefit while avoiding an overdose. In this Gizmo, you can give a patient one or more pills and monitor the levels of medication in...

Lesson Info Launch Gizmo

Dye Elimination

When a foreign substance such as a drug is ingested, it often remains in the bloodstream for a long time. This Gizmo models the elimination of substances from the bloodstream using water...

Lesson Info Launch Gizmo

Identifying Nutrients

Use a variety of real-world lab tests to analyze common food samples in order to determine if the food is a carbohydrate, a protein, or a lipid. Tests that can be performed include:...

Lesson Info Launch Gizmo

Cell Types

Explore a wide variety of cells, from bacteria to human neurons, using a compound light microscope. Select a sample to study, then focus on the sample using the coarse and fine focus...

Lesson Info Launch Gizmo

Disease Spread

  • Updated!

Observe the spread of disease through a group of people. The methods of transmission can be chosen and include person-to-person, airborne, and foodborne as well as any combination thereof....

Lesson Info Launch Gizmo

DNA Profiling

  • New!

Learn how DNA is compared to identify individuals. Identify the sections of DNA that tend to differ and use PCR to amplify these segments. Then use gel electrophoresis to create DNA...

Lesson Info Launch Gizmo

Eyes and Vision 1 - Seeing Color

  • New!

FREE with no time limit!

Observe how different colors of light are reflected or absorbed by colored objects. Determine that white light is a combination of different colors of light, and that one or more component...

Lesson Info Launch Gizmo

Eyes and Vision 2 - Focusing Light

  • New!

Once light enters the eye, it must be focused on the retina. Manipulate the pupil diameter to regulate the amount of light that enters then eye, then change the lens shape to focus light....

Lesson Info Launch Gizmo

Eyes and Vision 3 - Sensing Light

  • New!

Observe how photoreceptors on the retina are stimulated by different colors of light. Determine that cone cells are stimulated by specific colors of light and enable us to see color, while...

Lesson Info Launch Gizmo

Fingerprinting

  • New!

FREE with no time limit!

Collect fingerprints from simulated crime scenes using a camera, fingerprinting powder, and tape. Classify fingerprints into groups and subgroups, then identify minutiae. Match collected...

Lesson Info Launch Gizmo

Muscles and Bones

  • New!

FREE with no time limit!

See how muscles, bones, and connective tissue work together to allow movement. Observe how muscle contraction arises from the interactions of thin and thick filaments in muscle cells. Using...

Lesson Info Launch Gizmo

Eyes and Vision 1 - Seeing Color

  • New!

FREE with no time limit!

Observe how different colors of light are reflected or absorbed by colored objects. Determine that white light is a combination of different colors of light, and that one or more component...

Lesson Info Launch Gizmo

Fingerprinting

  • New!

FREE with no time limit!

Collect fingerprints from simulated crime scenes using a camera, fingerprinting powder, and tape. Classify fingerprints into groups and subgroups, then identify minutiae. Match collected...

Lesson Info Launch Gizmo

How Free Gizmos Work

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Start teaching with 20-40 Free Gizmos. See the full list.

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Access lesson materials for Free Gizmos including teacher guides, lesson plans, and more.

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All other Gizmos are limited to a 5 Minute Preview and can only be used for 5 minutes a day.

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Free Gizmos change each semester. The new collection will be available January 1 and July 1.

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About STEM Cases

Students assume the role of a scientist trying to solve a real world problem. They use scientific practices to collect and analyze data, and form and test a hypothesis as they solve the problems.

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Each STEM Case uses realtime reporting to show live student results.
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STEM Cases take between 30-90 minutes for students to complete, depending on the case.

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Student progress is automatically saved so that STEM Cases can be completed over multiple sessions.

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Multiple grade-appropriate versions, or levels, exist for each STEM Case.

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Each STEM Case level has an associated Handbook. These are interactive guides that focus on the science concepts underlying the case.

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© 2025 ExploreLearning. All rights reserved. Gizmo and Gizmos are registered trademarks of ExploreLearning. STEM Cases, Handbooks and the associated Realtime Reporting System are protected by US Patent No. 10,410,534

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Find Gizmos
  • FREE Gizmos
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  • STEM Cases
  • Browse by Standard
  • Browse by Grade & Topic
  • Browse by Core Curriculum
About Gizmos
  • What's a Gizmo?
  • About STEM Cases
  • What are Gizmos Investigations?
  • Take a Tour
  • Supporting All Students
  • How to Get Gizmos
  • Testimonials
  • K-5 Science
Research
  • The Impact of Gizmos on Student Achievement
  • The Research Behind Gizmos
Support
  • Professional Development Overview
  • Meet the Team
  • Course Catalog
  • Help Center
  • Site Status
Resources
  • Popular Gizmos Collections
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  • Success Stories
  • Insights
Get More Info
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© 2025 ExploreLearning. All rights reserved. Gizmo and Gizmos are registered trademarks of ExploreLearning. STEM Cases, Handbooks and the associated Realtime Reporting System are protected by US Patent No. 10,410,534

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