Students learn how circulatory, respiratory, digestive, muscular, and nervous systems work together maintaining life. Through animated journeys shrinking inside bodies or investigating organ shortage crises and donation chains, rotating through four stations testing pulse rates, reflexes, muscle-bone connections, and digestion, and engineering solutions for body system malfunctions like blocked vessels or asthma-obstructed airways, students discover how systems cooperate supporting complex functions.
- Lesson 1
Solve: Organ Donation + Sleeping Leg Mystery
Aaliyah is a circus trapeze artist, and tonight she can't feel her leg right before showtime! Mosa and Billy shrink to microscopic size, entering her body to investigate. They explore the circulatory system (pumping blood and oxygen), respiratory system (bringing in oxygen, removing carbon dioxide), digestive system (breaking down food into nutrients), muscular system (enabling movement), and nervous system (sending signals). The discovery: Aaliyah sat on her leg too long, cutting off blood flow. Without circulation delivering oxygen, nerves stopped signaling properly. One system failure cascades through all connected systems—the body functions as one integrated whole.
- Lesson 2
Make: Lab Stations: Experience Body Systems Interacting
Four stations revealing body system interactions. Station 1: Rest vs. Exercise—Students measure pulse and breathing rates at rest, then after exercise, discovering circulatory and respiratory systems work harder together during activity. Station 2: Patellar Reflex—Test knee-jerk reflexes with reflex hammers, observing how nervous and muscular systems communicate instantly. Station 3: Chicken Wing Motion—Dissect chicken wings (with gloves) to see how muscles attach to bones, demonstrating muscular and skeletal system connections. Station 4: Saltine Lab—Test crackers with Benedict's solution and iodine, watching chemical digestion break starches into sugars. Students construct visual models linking all systems together.
- Lesson 3
Engineer: Engineer a Solution when a Body Part Malfunctions
Design a solution for a body system malfunction: (1) Blood vessel blocked by plaque—engineer stents, clot-dissolving drugs, or bypass procedures; (2) Airways obstructed by asthma—design inhalers, breathing treatments, or airway-opening devices; (3) Stroke killing brain nerve cells from oxygen loss—create rehabilitation tools, clot removal devices, or preventive monitoring systems; (4) Weakened muscles from muscular dystrophy—develop support braces, mobility aids, or therapy equipment. Students research their chosen problem, design medical solutions, and present how their innovations address the malfunction while understanding that fixing one system helps restore overall body function.
- Next Generation Science Standards
- Inquiry Scale
- Common Misconceptions
- Vocabulary
- Content Expert
- Leveled Reading
* To give our users the most comprehensive science resource, Mosa Mack is piloting a partnership with RocketLit, a provider of leveled science articles.
- I Heart You
Your heart is a bit of a crazy person. Blood is pulled into the atria and is pushed out through the ventricles. Most of your blood leave your heart through the aorta. Your blood pressure is how much your blood is pushing on the walls of your blood vessels and can be affected by many things
- What is a Red Blood Cell?
This article covers one of the main jobs of your red blood cells: to transport oxygen to your cells for them to use to create usable energy and to take the carbon dioxide waste away from your cells.
- In The Blood
Your blood plays a team sport. Each different part works together to keep the whole field covered. Red blood cells handle oxygen, carbon dioxide, and nutrients. Your platelets make sure you stop bleeding once you start and white blood cells protect you from bad things that get into your body.
- We Get Around
Blood travels through blood vessels like cars travel down streets. Arteries are for getting the blood away from your heart and veins are for taking it back toward the heart. Capillaries are for getting things your cells need to them and getting things they don't need away out of your body.
- Things That Go Wrong With Circulation
Everybody's got problems, but let's hope they aren't problems with circulation. Most of the worst things that can happen with the circulatory system affect the blood that feeds the heart, or your coronary circulation. In addition, blood clots can form and travel to places like your brain and cut off your brain cells from oxygen and nutrients. Make sure to take care of yourself to prevent these things from happening!
- The Mouth
The journey starts here. This article describes what the digestive system is and also defines digestion. It also reviews what enzymes are and what the saliva in your mouth does to aid in digestion.
- What is Taste?
Taste buds are the tiny organs that stand guard inside your mouth. Teamed up with your nose to sniff out thing that are both delicious and dangerous, this article goes through the basics of the different parts of your taste buds.
- How to Get to the Stomach
Welcome your food to the slide that squeezes you down through a mucus filled cavity! This article discusses both the differences between the windpipe and the esophagus as well as a brief explanation of peristalsis and the function of mucus.
- The Stomach aka How to Make All Food Look the Same
When food enters your mouth, it can look many different ways, but the stomach puts a prompt end to that. With acid and churning, the stomach turns your delicious meals into chyme and sends it through the pyloric sphincter on to its next adventure.
- Small Intestine aka How to Soak up Food
In this article, students investigate the different functions of the small intestine. They look at the functions of the liver and pancreas in digestion and how villi help us to absorb our food into the bloodstream.
- Large Intestine aka the Dryer
In this article, students look at the function of the large intestine in the digestive system. They'll read about the water removal that occurs in the large intestine and the resulting feces that are stored in the rectum until they are let out through the anus.
- Nutrients or Why We Can't Eat Pizza For Every Meal
If only we could eat pizza for every meal! This article discusses four molecules that our bodies use for nutrition. Students will read a brief intro of where each molecule is found and what our body uses them for.
- Stop Stealing My Nutrients!
Some living things take more than they give back. In this article, students read about two of the most common parasites that we may find lurking around in our body. The article also talks about symbiosis as the ability of two organisms to live with each other and help, rather than hurt, each other's ability to survive.
- Messed Up Muscles
Let's face it, muscles don't always work the way they're supposed to. This article describes types of injuries and diseases that can result from or lead to messed up muscles.
- What Are Bones For?
Bones provide our bodies with protection and support, while also accomplishing other important tasks. They give our body a frame and at the same time produce essential blood and immune cells. In order to stay strong, our bones are constantly broken down and built back up by cells called osteocytes. If only we have nerve cells that constantly rebuilt our memories of all this information!
- Connective Tissue
In between muscles, organs and the rest of your body is connective tissue. This article discusses the different types of connective tissue and the basics of their function.
- Broken Bones
Bones are your body's support system. This article talks about the needs of bones and what can go wrong with bones. Calcium is stored in the bones, but it can be pulled out for use in other parts of the body when a person has osteoporosis. A slight curve to the spine is normal, but in Scoliosis, the curve is exaggerated and may require correction.
- They Work Together
The parts of your body almost never work in isolation. Muscles and bones, coming together at joints, work to contribute to and support your movement. Their powers combined are what allows you to exert great amounts of force.
- Reflex
In this article, students are introduced to how reflexes work in the body. The process starts with sensory neurons that sense stimuli and connect with interneurons to decide what to do. Motor neurons are activated without the brain's involvement in a reflex, because action is needed before any thoughts or associations need to be accessed. OUCH THAT HURTS MOVE NOW!
- What Do Lungs Do?
Your lungs are like a lunchroom. Oxygen comes in and is exchanged for carbon dioxide in a process called respiration.
- The Outer Ear
The first stop on sound's trip to your brain is the outer ear. The pinna catches the sound and then it travels down your ear canal deeper into your head. Which part do you think annoying songs actually get stuck in?
- The Middle Ear
The Middle Ear is the halfway point in the journey of sound to the brain. Here, the eardrum transfers vibrations to the ossicles and the pressure from the shaking eardrum pushes deeper into the ear.
- Inner Ear
The Inner ear is the last part of sound's journey before it's sent to your brain as an electrical signal. This is one of the most complicated parts, as this is where pitch is detected and your balance is based.
RocketLit serves tailored Science reading to every student in your classroom at their independent reading level.
RocketLit serves tailored Science reading to every student in your classroom at their independent reading level.
RocketLit serves tailored Science reading to every student in your classroom at their independent reading level.
RocketLit serves tailored Science reading to every student in your classroom at their independent reading level.
RocketLit serves tailored Science reading to every student in your classroom at their independent reading level.
RocketLit serves tailored Science reading to every student in your classroom at their independent reading level.
RocketLit serves tailored Science reading to every student in your classroom at their independent reading level.
RocketLit serves tailored Science reading to every student in your classroom at their independent reading level.
RocketLit serves tailored Science reading to every student in your classroom at their independent reading level.
RocketLit serves tailored Science reading to every student in your classroom at their independent reading level.
RocketLit serves tailored Science reading to every student in your classroom at their independent reading level.
RocketLit serves tailored Science reading to every student in your classroom at their independent reading level.
RocketLit serves tailored Science reading to every student in your classroom at their independent reading level.
RocketLit serves tailored Science reading to every student in your classroom at their independent reading level.
RocketLit serves tailored Science reading to every student in your classroom at their independent reading level.
RocketLit serves tailored Science reading to every student in your classroom at their independent reading level.
RocketLit serves tailored Science reading to every student in your classroom at their independent reading level.
RocketLit serves tailored Science reading to every student in your classroom at their independent reading level.
RocketLit serves tailored Science reading to every student in your classroom at their independent reading level.
RocketLit serves tailored Science reading to every student in your classroom at their independent reading level.
RocketLit serves tailored Science reading to every student in your classroom at their independent reading level.
RocketLit serves tailored Science reading to every student in your classroom at their independent reading level.
RocketLit serves tailored Science reading to every student in your classroom at their independent reading level.
- I Heart You
