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Health and medicine Science Khan Academy

WEBThe medical world can be a confusing place. Patients, their families, and even students entering health fields might feel overwhelmed by the large vocabularies and …

Actived: 5 days ago

URL: https://www.khanacademy.org/science/health-and-medicine

Circulatory system anatomy and physiology Khan Academy

WEBAbout this unit. Your heart sits in the middle of your chest and pumps blood from about 4 weeks after conception until the day that you die. This little pump is the size of your …

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Common diseases in humans (article) Khan Academy

WEBRheumatoid Arthritis: An autoimmune disease that causes joint pain, inflammation, and damage to other organs. Malaria: A mosquito-borne infectious disease that causes …

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Respiratory system anatomy and physiology Khan Academy

WEBCentral chemoreceptors. The respiratory center. Sneeze, cough, and hiccup. With every inhale, air rushes through your windpipe to your lungs. After 20 to 30 branch points, …

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Musculoskeletal system physiology and disease Khan Academy

WEBLearn. Myosin and actin. How tropomyosin and troponin regulate muscle contraction. Role of the sarcoplasmic reticulum in muscle cells. Anatomy of a skeletal muscle cell. …

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What is hypertension

WEBHypertension, also known as high blood pressure, is when the pressure of the blood being pumped through your arteries is higher than it should be. High blood pressure, or …

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What is diabetes mellitus

WEBIn both types, your body has trouble transporting sugar from your blood into your cells. This leads to high levels of glucose in your blood and a deficiency of glucose in your cells. …

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The circulatory system review (article) Khan Academy

WEBThere are one atrium and one ventricle on each side of the heart. The atria receive blood and the ventricles pump blood. The human circulatory system consists of several …

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The immune system review (article) Khan Academy

WEBThe immune system responds to antigens by producing cells that directly attack the pathogen, or by producing special proteins called antibodies. Antibodies attach to an …

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Human body systems High school biology Science Khan …

WEBAbout this unit. Your body is an amazing system! The human body is made up of groups of organs, called organ systems, that work together to keep the body in balance. In this …

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Gastrointestinal system physiology and disease Khan Academy

WEBDo you live to eat, or eat to live? Either way, no one can deny the importance of food and water in our everyday lives. The energy from food is carefully extracted through …

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Respiratory distress (article) Khan Academy

WEBRespiratory distress is when your body needs more oxygen (such as after running an intense race). It’s fairly easy to spot with some clues in mind: Rapid breathing …

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Meet the lungs! (video) Human body systems Khan Academy

WEBMeet the lungs! Breathing in through the mouth or nose, air travels down the throat, through the Adam's apple or voice box, and into the lungs. The lungs, which look like an upside …

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Antibiotics: An overview (article) Khan Academy

WEBAntibiotics: An overview. Antibiotics are a type of medicine which are used to treat bacterial infections. Every day we come into contact with thousands of bacterial cells. We are …

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Drug abuse and drug addiction (article) Khan Academy

WEBIn the context of substance use disorders, substances are groups of drugs that have similar effects on your brain, body, and behavior. There are 10 classes of substances …

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