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The Heart : Layers of the Heart

By: Rishi Desai

...Take a closer look at the heart, explore some of its interesting features and get to know the three layers that make up the heart. Rishi is a pediatric infectious disease physician and works at Khan Academy....

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Heart Muscle Contraction : Heart Cells Up Close!

By: Rishi Desai

...Get a close-up view of the cardiac cells and see what makes them different from the other (skeletal and smooth) muscle cells. Rishi is a pediatric infectious disease physician and works at Khan Academy....

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Heart Disease and Stroke : Strokes

By: Sal Khan

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Blood Pressure : What is blood pressure?

By: Rishi Desai

Find out what a systolic and diastolic blood pressure mean. Rishi is a pediatric infectious disease physician and works at Khan Academy.

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Blood Pressure : Learn how a stethoscope can help determine blood pressure

By: Rishi Desai

...Learn how Dr. Korotkoff cleverly used a stethoscope to determine blood pressure, and that we still use his trick today! Rishi is a pediatric infectious disease physician and works at Khan Academy....

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Blood Pressure Control : ADH effects on blood pressure

By: Rishi Desai

See how ADH acts on blood vessels and the kidney to raise blood pressure. Rishi is a pediatric infectious disease physician and works at Khan Academy.

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Blood Pressure : Blood pressure changes over time

By: Rishi Desai

...See how increasing resistance in the blood vessels can cause blood pressure to rise over time. Rishi is a pediatric infectious disease physician and works at Khan Academy....

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Fetal Circulation : Meet the Placenta!

By: Rishi Desai

...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....

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Health Care System : Medicare Overview

By: Sal Khan

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Changing the PV Loop : Reimagine the Pressure Volume Relationship

By: Rishi Desai

...he cellular level to cause two identical left ventricular volumes to have such different pressures! Rishi is a pediatric infectious disease physician and works at Khan Academy....

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Miscellaneous : Systemic Thinking About Cancer

By: Sal Khan

Dr. David Agus discusses thinking systemically about cancer and other things

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Blood : Hemoglobin moves O2 and CO2

By: Rishi Desai

...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....

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Healthy Lifestyle : Calculate your own Body Mass Index

By: Rishi Desai

...Find out how simple it is to calculate your BMI and the common BMI categories. Rishi is a pediatric infectious disease physician and works at Khan Academy....

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Blood Pressure Control : Angiotensin 2 raises blood pressure

By: Rishi Desai

See how Angiotensin 2 effects 4 target organs to increase blood pressure. Rishi is a pediatric infectious disease physician and works at Khan Academy.

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The Lungs : Inhaling and Exhaling

By: Rishi Desai

Find out exactly why air goes in and out of the lungs. Rishi is a pediatric infectious disease physician and works at Khan Academy.

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Miscellaneous : Bacterial Meningitis

By: Sal Khan

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medicine

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Colon Disease : Hyperplasia in Colon Tissue

By: Sal Khan

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medicine, pathology, histology

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Pressure Volume Loops : Drawing a Pressure-Volume Loop

By: Rishi Desai

...Use the left ventricular pressure and volume information to put together a cool new graph. Rishi is a pediatric infectious disease physician and works at Khan Academy....

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Fetal Circulation : Fetal Circulation Right Before Birth

By: Rishi Desai

...Watch how the blood flows through the fetal circulation and compare it to what happens in the baby's body. Rishi is a pediatric infectious disease physician and works at Khan Academy....

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Changing the PV Loop : Increasing the Heart's Force of Contraction

By: Rishi Desai

...of contraction in end-diastole, whereas more calcium increased force of contraction in end-systole. Rishi is a pediatric infectious disease physician and works at Khan Academy....

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