Does this make sense? Not at all. But now you know that blood is red due to the shape of iron in your hemoglobin, and NOT because your blood is rusty. 12. The brain works harder while we are asleep than when we are awake If you’ve ever wondered how the trillions of cells in your body work together to keep you alive, Live Science has the answers. Throughout this collection, you’ll find out how complex networks of neurons control our thoughts and actions, and how specialised systems perform vital functions such as keeping our blood pumping, making our muscles move, and protecting us from harm.

How Your Body Works

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.When you drink alcohol, your liver oxidises 95 per cent of it. This means your liver converts alcohol into water and carbon monoxide. Your liver can only oxidise one unit of alcohol an hour. Drinking with an empty or full stomach How Your Body Works How Your Body Works If you’ve ever wondered how the trillions of cells in your body work together to keep you alive, Live Science has the answers. Throughout this collection, you’ll find out how complex networks of neurons control our thoughts and actions, and how specialised systems perform vital functions such as keeping our blood pumping, making our muscles move, and protecting us from harm. For crying out loud, the eye has its own special bathing system — tears! Above the outer corner of each eye are the lacrimal (say: LAK-ruh-mul) glands, which make tears. Every time you blink your eye, a tiny bit of tear fluid comes out of your upper eyelid. It helps wash away germs, dust, or other particles that don't belong in your eye. Your skin consists of three main layers. The outer layer, called the epidermis, contains skin cells, pigment, and proteins. The middle layer, called the dermis, contains blood vessels, nerves, hair follicles, and oil glands, and it provides nutrients to the epidermis. The layer under the dermis, called the subcutaneous layer, contains sweat glands, some hair follicles, blood vessels, and fat. Each layer also contains connective tissue with collagen fibers to give support and elastin fibers to provide flexibility and strength. Cells in the deepest layer of your epidermis are constantly dividing to make new cells, providing your skin with a durable overcoat, which protects deeper cells from damage, infection, and dryness. Cells on the surface of your epidermis flake off and are continuously replaced with new ones, so that about every 30 days your body produces a whole new set of skin. A human body sheds about 600,000 particles of skin every hour—that’s about 1.5 pounds (0.68 kilogram) a year. By age 70, an average human will have lost 105 pounds (47.6 kilograms) of skin.

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

Alcohol also stays in women’s blood for longer. They have lower levels of the enzyme that breaks down alcohol. Your eyes are at work from the moment you wake up to the moment you close them to go to sleep. They take in tons of information about the world around you — shapes, colors, movements, and more. Then they send the information to your brain for processing so the brain knows what's going on outside of your body. If you can't see near or far objects, your eyeballs are shaped weird, which, while an expensive problem to have, makes you special (just like everybody else who has to wear eyeglasses).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 cardiovascular (or circulatory) system transports blood, oxygen, and nutrients throughout the body.

13 Questions About How the Human Body Works Answered 13 Questions About How the Human Body Works Answered

The muscular system facilitates movements of our bodies, from reaching for the remote control to smashing out an intense workout in the boxing ring. The reproductive system—*insert opening riff to Marvin Gaye's Let's get it on—allows us to uhh make babies. The circulatory system acts as your body’s transport system. The electrically-charged heart muscle pumps blood throughout the body, delivering nutrients and oxygen to every cell via countless tiny capillaries. 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.

In the stomach…Stomach acids start to break down big chunks of food into smaller pieces so more nutrients can be absorbed. Sugar is harmful, right? While refined sugar does cause inflammation and a range of health problems, the body needs healthy sugars to function. Thousands of years ago, ancient Eastern medicine doctors suspected that the body had unique energetic properties. The movement of energy through the body is what supports life and keeps our organ systems functioning. It is also what connects all our systems. In more recent years, modern research has proven that this is, in fact, true! These next parts are really cool, but you can't see them with just your own eyes! Doctors use special microscopes to look at these inner parts of the eye, such as the lens. After light enters the pupil, it hits the lens. The lens sits behind the iris and is clear and colorless.