Science for TEAS and HESI
Build the exact scientific foundation needed to score high on pre-nursing entrance exams. Learn high-yield anatomy, cell biology, essential chemistry, and scientific reasoning from square one.
Like Duolingo, but for Science for TEAS and HESI. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
25 levels across 4 sections, about 50 minutes end to end, roughly 10 days at five minutes a day. It moves through Navigating the Vital Body Systems; Control, Movement, and Homeostasis; The Microscopic Foundations of Life; and Chemical Rules and Experimental Reasoning. It starts from scratch.
Free forever · No credit card · iPhone & Android

Key ideas in Science for TEAS and HESI
- Standard anatomical position assumes a person standing upright with palms facing forward
- Anterior refers to the front and posterior refers to the back
- Proximal and distal describe positions along limbs relative to where the limb joins the trunk
- Deoxygenated blood returns from the body into the right side of the heart
- The right ventricle pumps oxygen-poor blood to the lungs via the pulmonary artery
- Oxygenated blood returns from the lungs to the left side of the heart to be pumped to the body via the aorta
- Heart valves close to keep blood flowing in one direction and prevent backflow
- The audible 'lub-dub' sounds are caused by the physical snapping shut of the heart valves, not blood rushing or muscular squeezing
- Arteries leave the heart under high pressure, requiring thick elastic and muscular walls
- Capillaries have microscopic, single-cell-thick walls that permit oxygen and nutrients to diffuse into tissues
- Veins carry low-pressure blood back toward the heart and use internal valves to keep blood moving against gravity
- Systolic pressure is the top number representing peak pressure in the arteries when the ventricles contract
- Diastolic pressure is the bottom number representing resting baseline arterial pressure between beats while ventricles relax
- Inhalation is active: contracting the diaphragm pulls it downward and enlarges the chest cavity
- Expanding chest volume causes pressure inside the lungs to fall below outside atmospheric pressure
- Air moves naturally from higher outside pressure to lower inside pressure
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives Science for TEAS and HESI the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
Which word means toward the front side of your body?
Get it right to open this lesson and 24 more in the app.
Where Science for TEAS and HESI takes you
- 1
Navigating the Vital Body Systems
- Body Orientation and the Cardiovascular Circuit
- Gas Exchange, Digestion, and Waste Filtration
- Immunity and the Lymphatic Shield
- 2
Control, Movement, and Homeostasis
- Neural Wiring and Endocrine Messaging
- Bones, Skeletal Muscles, and the Skin Barrier
- 3
The Microscopic Foundations of Life
- Cell Architecture and Molecular Transport
- Cell Division, DNA, and Inheritance
- 4
Chemical Rules and Experimental Reasoning
- Chemical Foundations and Solution Behavior
- Scientific Inquiry and Data Interpretation
4 sections · 9 units · 25 levels. Built to play, not to enroll.
Tomo is in ChatGPT
Tomo is also a ChatGPT plugin: the same playable courses, built and played inside your chat.
Add Tomo to ChatGPT- What to ask
- “Make me a Tomo course on black holes.” “Turn this chat into a Tomo course.”
- What you get
- Quick questions with instant feedback, hearts and stars, ready to play in about a minute.
- Where it goes
- No sign-up to start. Connect your Tomo account and your streak carries on in the app.
You pick the voice
Science for TEAS and HESI is taught in the Explain Like I'm 5 style: no big words. promise.. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
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Start Science for TEAS and HESI today.
Download Tomo, search Science for TEAS and HESI, and play your first lesson in under a minute.