Learn the two ways that oxygen moves from the lungs to the tissues, and the three ways that carbon dioxide returns from the tissues to the lungs. Rishi is a pediatric infectious disease physician and works at Khan Academy.
- Author:
- Khan, Salman
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Learn how oxygen content (CaO2) is related to Hemoglobin concentration (Hb), oxygen saturation (SaO2), and the partial pressure of oxygen (PaO2). Rishi is a pediatric infectious disease physician and works at Khan Academy.
- Author:
- Khan, Salman
Spin down your blood and find out what it's made up of. Rishi is a pediatric infectious disease physician and works at Khan Academy.
- Author:
- Khan, Salman
Learn how there are two distinct Bohr effects happening at the same time in the placenta. Rishi is a pediatric infectious disease physician and works at Khan Academy.
- Author:
- Khan, Salman
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.
- Author:
- Khan, Salman
Learn how blood flows through the heart, and understand the difference between systemic and pulmonary blood flow. Rishi is a pediatric infectious disease physician and works at Khan Academy.
- Author:
- Khan, Salman
Watch how the fetal heart allows blood to simply bypass the lungs altogether using the Foramen Ovale and the Ductus Arteriosus! Rishi is a pediatric infectious disease physician and works at Khan Academy.
- Author:
- Khan, Salman
Watch how blood gets diverted away from alveoli with low oxygen levels. Rishi is a pediatric infectious disease physician and works at Khan Academy.
- Author:
- Khan, Salman
Watch as fetal blood goes through umbilical vessels and takes a shortcut through the Ductus Venosus to make it back to the heart. Rishi is a pediatric infectious disease physician and works at Khan Academy.
- Author:
- Khan, Salman
Most of the time, we don't test for the flu, but it can be useful. Rapid flu tests are done with a quick nose swab or wash, and can detect Type A or Type B Flu, but beware - like all tests, sometimes they make mistakes.
- Author:
- Khan, Salman
The flu is caused and spread by a virus called influenza, which has proteins on its outer coat (think of a person wearing a jacket) called Hemagglutinin and Neuraminidase. The flu uses these proteins to enter and exit cells, and we actually name these proteins H and N (easy to remember) and number them to keep track of all the different types that we have found. The flu is a sneaky little bugger though, and can avoid our immune system by making subtle genetic mutations over time (drift) or shuffling up its genetic material completely (shift)!
- Author:
- Khan, Salman
Want to avoid getting sick with the flu? If so, get a flu vaccine, it's 60-70% effective! You have a couple of options: TIV (dead virus, injection) or LAIV (weak virus, spray). They can cause some side effects like a sore arm (TIV) or a runny nose (LAIV), but isn't that better then lying in bed with a cough and fever for a week? Don't worry though, if you do get really sick with the flu, we have some medications that can help.
- Author:
- Khan, Salman
The fact is that many folks don't get the flu shot. Find out some of the common reasons why this is the case, and some of the common myths that continue to circulate on the internet! This video discusses making the flu vaccine each year.
- Author:
- Khan, Salman
Getting the flu is awful! You get respiratory symptoms (Example: stuffy nose, sore throat, or cough) and constitutional symptoms (Example: fevers, chills, or body aches), and youre usually in bed for 3-7 days. The flu virus spreads from person to person through tiny little droplets and is really common during the winter. Learn how were getting smart about tracking the flu, and how you can avoid getting sickĚä
- Author:
- Khan, Salman
Where does your blood go after it leaves the heart? Your body has a fantastic pipeline system that moves your blood around to drop off oxygen and food to those hungry cells, and removes cell waste. Learn how arteries carry blood away from the heart, how veins bring blood back to the heart, and about the different layers of cells that make up these blood vessels.
- Author:
- Khan, Salman
Find out how the your body uses special cells that are peripheral to the brain (outside the brain) to sense levels of O2, CO2, and pH. Rishi is a pediatric infectious disease physician and works at Khan Academy. These videos do not provide medical advice
- Author:
- Khan, Salman
Find out how to calculate exactly how much oxygen is deep down inside your lungs! Rishi is a pediatric infectious disease physician and works at Khan Academy. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.
- Author:
- Khan, Salman
Students learn about the anatomy of the ear and how the ears work as a sound sensor. Ear anatomy parts and structures are explained in detail, as well as how sound is transmitted mechanically and then electrically through them to the brain. Students use LEGO® robots with sound sensors to measure sound intensities, learning how the NXT brick (computer) converts the intensity of sound measured by the sensor input into a number that transmits to a screen. They build on their experiences from the previous activities and establish a rich understanding of the sound sensor and its relationship to the TaskBot's computer.
- Author:
- GK-12 Program, Computational Neurobiology Center, College of Engineering,
- Marianne Catanho, Sachin Nair, Charlie Franklin, Satish Nair
Students learn about the heart and its role at the center of the human cardiovascular system. In the associated activity, students play out a scenario in which they are biomedical engineers asked to design artificial hearts. They learn about the path of blood flow through the heart and use that knowledge to evaluate designs of artificial hearts on the market.
- Author:
- TeachEngineering.org
- Bio-Inspired Technology and Systems (BITS) RET,
- Angela D. Kolonich
This lesson describes how the circulatory system works, including the heart, blood vessels and blood. Students learn about the chambers and valves of the heart, the difference between veins and arteries, and the different components of blood. This lesson also covers the technology engineers have developed to repair the heart if it is damaged. Students also understand how the circulatory system is affected during spaceflight (e.g., astronauts lose muscle in their heart during space travel).
- Author:
- Janet Yowell
- Julie Marquez
- Malinda Schaefer Zarske
- Sara Born
- Integrated Teaching and Learning Program,
- Jessica Todd
- Denali Lander
- Teresa Ellis