Although mom controls the oxygen source, the fetus has a couple of clever tricks to get the most oxygen possible! Rishi is a pediatric infectious disease physician and works at Khan Academy.

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

Learn how the needs of the fetus are met by the placenta, which is a special organ that belongs to both the mother and the fetus! Rishi is a pediatric infectious disease physician and works at Khan Academy.

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

Using the stethoscope to check blood pressure is a technique thatŐs been used for >100 years! Blood pressure is one of the major vital signs frequently measured by health care workers, and it tells us a lot about our blood circulation. Learn what blood pressure is, how it relates to resistance in a tube, why it is necessary to get oxygen to your cells, and how it can change as you age. WeŐll finally put it all together by relating pressure, flow, and resistance in one awesome equation!

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

The human body enjoys stability. For example, if your blood pressure changes, the body puts a couple of brilliant systems into motion in order to respond and bring your blood pressure back to normal. There are some quick responses using nerves and some slower responses using hormones. The system using hormones is sometimes called the renin-angiotensin-aldosterone-system (RAAS), which is the main system in the body for controlling blood pressure. When your blood pressure drops too low or gets too high, your kidneys, liver, and pituitary gland (part of your brain) talk to each other to solve the problem. They do this without you even noticing! Learn how the body knows when the blood pressure has changed, and how hormones like angiotensin 2, aldosterone, and ADH help return blood pressure to back to normal.

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

No organ quite symbolizes love like the heart. One reason may be that your heart helps you live, by moving ~5 liters (1.3 gallons) of blood through almost 100,000 kilometers (62,000 miles) of blood vessels every single minute! It has to do this all day, everyday, without ever taking a vacation! Now that is true love. Learn about how the heart works, how blood flows through the heart, where the blood goes after it leaves the heart, and what your heart is doing when it makes the sound ŇLub DubÓ.

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

Every time you take a breath, oxygen makes it way into your lungs. Follow along on that journey! Rishi is a pediatric infectious disease physician and works at Khan Academy.

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

In this video, Rain Adams (age 12, Colorado) talks about her passion for healthy eating and how it inspired her to create her Healthy Lunchtime Challenge winning recipe for Rain's Turkey Chili. Rain, who as a nine-year-old started her own vegan pet treat company, learned to cook from her mother. She says it's fun for kids to get in the kitchen and make healthy foods. Rain's advocacy has extended to appearances on the TV news, hosting her own YouTube channel, and contributing to her family's blog, Building a Healthy Family. [2:52]

In this video, Sydney Mazik (age 12, Ohio) talks about her love of cooking and how two healthy foods that her family eats inspired her Healthy Lunchtime Challenge winning recipe for Spaghetti Squash Asparagus Pie. She created her dish to spread awareness about spaghetti squash, which she says is a vegetable most people don't know about. Sydney and her twin sister were born three months early. Due to a bacterial infection, Sydney was not expected to survive more than a day. She overcame this and other challenges, and today uses her winning recipe to raise money for a hospital's neonatal intensive care unit. [2:49]

In this video, learn how Leo Koch (age 9, Maine) chooses healthy foods, like those in his Healthy Lunchtime Challenge winning recipe for Vegan Superhero Soup, to fuel his competitive running and help manage his diabetes. Leo leads an active life. As a type 1 diabetic, his nutritional needs demand added scrutiny. Because the body processes nutrients in different ways, Leo analyzes foods for their protein, fat, and carbohydrate contents. [2:45] Check out the Support Materials below for Teaching Tips and a link to a customizable student handout.

Support healthy eating by using these resources in the classroom. The Healthy Lunchtime Challenge was a nationwide recipe contest for kids ages 8-12 that promotes cooking and healthy eating. Winners attended a "State Dinner" at the White House on July 14, 2016. The media resources here also feature the winners of the 2015 Healthy Lunchtime Challenge. This Collection includes: Interactive Lesson (3), Interactive (3), Video (9), Lesson Plan (1), Document (1), Media Gallery (1), Image (1) for Grades All.

This video demonstrates two of the most important habits we can teach children: covering your mouth when you cough or sneeze and washing your hands. In this video, a young girl demonstrates the correct procedure for performing these two simple tasks. Support materials are included. [1:14]

In this lesson students will learn about germs and how they spread. They will learn the proper steps to hand washing and preventing the spreading of germs.

In this lesson students will learn about the right way to brush their teeth and why its important to keep them clean.

The Healthy Kids Project uses song, movement, and animation in ten engaging lessons that support healthy choices and attitudes--teaching not only successful actions, but also successful strategies. It's a turnkey kit for teachers to impart critical life lessons about health, without taking time away from core subjects.

Learn about the functions of our bones and muscles and their importance in helping us move. [1:00]

In this animated video segment adapted from the Eagle Books series produced by the Centers for Disease Control and Prevention, Mr. Eagle describes to Rain That Dances and Thunder Cloud, two American Indian boys, how people used to be strong and healthy because they kept their bodies moving by working hard and playing outside every day. Discussion questions and background information provided. [4:16]

These activities are designed to teach students to use their bodies in daily activities, by promoting a regular routine of using large and small motor skills, personal space, and boundary awareness.