How Your Body Works: 1 (Children's World)

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A moderate sunburn can do long-term damage to the blood vessels in your skin, making it more difficult for the affected areas to heal and stay healthy. It can actually take four to fifteen months for these capillaries and small arteries and veins to return to a normal condition. 15. All body parts can repair themselves (except teeth) When you think of your body, what do you think of? Your arms, your legs, your brain? What about the 100 trillion cells that work together to make up the big picture of you? What about the outside factors that contribute to your health just as much as the internal factors?

The Human Body - KS2 The World Around Us - BBC Bitesize

Every good design contains a reserve tank, and your body is no different. Whether you’re dealing with an injury, illness, or other medical condition, a reserve tank offers a safety net of life-preserving fuel and nutrients. Fuel is important, but we also need a way to incorporate that fuel into the body. Digestion doesn’t start in the stomach, or even your mouth. Digestion actually starts in your brain! Nearsightedness, or myopia, is caused by a greater curve in the cornea of the eye, or by an elongation of the eyeball. Farsightedness, or hyperopia, is caused by a corneal curve that is too small, or by having a short eyeball. 9. Vaccines safely help the body to recognize and fight off infections later in life Proprioception: Spatial body awareness. What's that? Close your eyes and touch your nose. That's what proprioception is.

The brain is the key to the body’s nervous system: it contains between 10 billion and 100 billion nerve cells, or neurons. Neurons combine to form the body’s nerves, thin cords that spread from head to toe and all parts in between. Neurons take in and send out electrical signals, called impulses, that control or respond to everything your body does and feels. The brain is constantly receiving messages and sending them out all the time; it handles millions of nerve impulses every second. So often we feel powerless in our health. But the truth is that while we all have tendencies to certain issues, we also have the power to change our health trajectory. In the brain…The smell of food triggers your brain, which sends a message to your gut to prepare for a meal. The gut then starts producing digestive juices and enzymes to transform the food into usable molecules for the body.

How does the human body work? - Class 11 - Khan Academy

That, my friend, is your immune system at work! And isn't it a beautiful thing? Once the vaccine's message has been received, your immune system begins rapidly producing antibodies, which can make you feel tired and achy. Sometimes, you can even get feverish, which is your body's way of fighting bugs: literally by turning up the heat. This cooks the little bastards before they can do any (more) damage. 10. We still aren’t 100% sure why people yawn Your eyes sometimes make more tear fluid than normal to protect themselves. This may have happened to you if you've been poked in the eye, if you've been in a dusty or smoking area, or if you've been near someone who's cutting onions. Interestingly, our bodies will tolerate blood that is absent in a certain antigen we already have, but it will not tolerate the introduction of a new antigen (i.e. one it does not recognize). This is why people with AB+ blood are considered universal recipients: because they have already every antigen in their blood.

Alcohol is a diuretic and increases urine production. When you drink alcohol, you need to urinate more often. This causes thirst and dehydration. Lungs The endocrine system produces hormones that regulate metabolism, growth and development, tissue function, sexual reproduction, sleep, and mood.

Your Body Parts Work? | Non Stop Episodes | The Dr How Do Your Body Parts Work? | Non Stop Episodes | The Dr

While you don’t have control over your genetics, you do have control over your epigenetics. You can prevent this cascade of events by maintaining a healthy lifestyle. For instance, eating a diet rich in colorful whole foods and steering clear of GMO foods, pesticides, and processed foods can protect your cells. Exercising regularly, drinking plenty of water, and getting outside promote a healthy balance. The lymphatic system is part of the immune system and complementary to the circulatory system. It keeps body fluid levels in balance and defends against infections. In the mouth…As you chew, you help break down your food into digestible particles. Enzymes in your saliva also help to start the digestive process and breakdown of food. The optic nerve serves as a high-speed telephone line connecting the eye to the brain. When you see an image, your eye "telephones" your brain with a report on what you are seeing so the brain can translate that report into "cat," "apple," or "bicycle," or whatever the case may be. What Are the Lacrimal Glands? And Why Do Eyes Need Tears?

So, the next time you're tempted to forgo sleep for studying, remember that sleep is essential for learning and remembering! Read: ' The relationship between dreaming, learning, and memory.' 13. The liver has over 500 functions Take the brain for instance. At its simplest, the brain is a bundle of fat and protein. Fat myelinates your nerve cells and helps speed up communication. Proteins called peptides make up other parts of the brain and neurotransmitters. Glucose (sugar), ketones, and other polysaccharides fuel the brain with energy so we can carry out all our daily functions and think.

15 Human biology basics everyone should know - Brainscape 15 Human biology basics everyone should know - Brainscape

So, now you're acquainted with the human body's 12 dominant systems. Of course, each system performs a complex array of tasks, oftentimes in tandem/co-operation with other systems, but now you've got the basic picture. Tears also keep your eye from drying out. Then the fluid drains out of your eye by going into the lacrimal duct (this is also called the tear duct). You can see the opening of your tear duct if you very gently pull down the inside corner of your eye. When you see a tiny little hole, you've found the tear duct. If you drink alcohol with an empty stomach, the alcohol passes directly into your bloodstream. If you’ve eaten before drinking, the rate of alcohol absorption slows down but doesn’t stop. Types of drink The nervous system, which consists of your brain, the spinal cord, and all the nerves throughout your body, controls movement, balance, the five senses, thought processes, and awareness.The eyelid protects the front part of the eye. The lid helps keep the eye clean and moist by opening and shutting several times a minute. This is called blinking, and it's both a voluntary and involuntary action, meaning you can blink whenever you want to, but it also happens without you even thinking about it. You can develop a stomach ulcer by drinking too much alcohol. This can happen when the stimulated gastric juices mix with the high alcohol content and irritate your stomach lining. Bloodstream The muscular system facilitates movements of our bodies, from reaching for the remote control to smashing out an intense workout in the boxing ring. Each of these senses is associated with its own organ (taste with the tongue, smell with the nose) or sensory receptor (the skin contains separate touch, temperature, and pain receptors). 7. Our appendix does actually still have a purpose