The Human Body/ 13 Questions About How The Human Body Works Answered
The human body is a single structure but it is made up of billions of smaller structures of four major kinds: cells, tissues, organs, and systems. An organ is an organization of several different kinds of tissues so arranged that together they can perform a special function.
The basic processes of life include organization, metabolism, responsiveness, movements, and reproduction. In humans, who represent the most complex form of life, there are additional requirements such as growth, differentiation, respiration, digestion, and excretion.
The human life process includes organization, metabolism, responsiveness, movements, reproduction, growth, differentiation, respiration, digestion, and excretion. All these processes work together, in fine-tuned balance, for the well-being of the individual and to maintain life. Life depends on certain physical factors from the environment, which include water, oxygen, nutrients, heat, and pressure.
The Human Body
The human body contains approximately 6 quarts (5.6 liters) of blood. Blood acts as your body’s transportation system—in one day, your blood travels nearly 12,000 miles (19,312 kilometers). Pumped along by your heart, blood takes oxygen from the air you breathe and nutrients from the food you eat to all the cells of your body. (Your heart pumps 1 million barrels of blood during your lifetime—enough to fill three supertankers.)
Blood also keeps cells clean and healthy by transporting waste products away after the nutrients and oxygen have been used for processes such as growth and repair. In addition, blood transports hormones—chemicals made in glands that control a variety of processes—throughout your body.
Human beings are arguably the most complex organisms on this planet. Imagine billions of microscopic parts, each with its own identity, working together in an organized manner for the benefit of the total being. The human body is a single structure but it is made up of billions of smaller structures of four major kinds.
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Here are the 13 Questions About How The Human Body Works Answered
1. What do plasma, red blood cells, and white blood cells have to do with blood?
More than 1/2 of your blood is a mild yellow watery liquid known as plasma. Plasma includes vitamins and waste products, at the side of chemicals and rely upon wanted for clotting, or sealing a wound earlier than too much blood escapes. The rest of the blood is made of tiny cells. maximum is crimson blood cells, which distribute oxygen all through your frame and carry away the waste fuel carbon dioxide, that’s launched out of your lungs.
The last cells are white blood cells, which guard against infection by attacking and destroying disease-causing germs that input your body. Red blood cells are the smallest cells in your frame. However, what they lack in size they make up for in number: in a drop of blood the dimensions of the head of a pin, there are 5 million pink blood cells. In that same drop are 10,000 white blood cells and 250,000 platelets, small ovals of remember that collect anywhere a blood vessel is injured to plug the hollow and help form a clot.
2. Why is blood red?
As the young red blood cell grows and takes on an adult form in the marrow of the bone, it loses its nucleus, and it increases its production of hemoglobin. Hemoglobin is the red pigment, or color of blood, and contains iron, combined with protein.
(Oxygen combined with iron is red; the more oxygen iron has bound to it, the redder it is.) When blood passes through the lungs, oxygen attaches itself to the hemoglobin of the red cells. From there, the red blood cells carry the oxygen through the arteries and the capillaries to all other cells of the body.
The arteries appear reddish because the iron in the blood gives up its oxygen to the cells that need it as the red blood cells travel throughout the body. By the time the blood is back on its way to the heart and then to the lungs, it has less than half as much oxygen as it did before. The veins, therefore, do not have as much oxygen as the other tissues, and they appear bluish.
3. What does my brain do, besides think?
The brain is the body’s command center. Everything we do—eating, talking, walking, thinking, remembering, sleeping—is controlled and processed by the brain. As the most complex organ in the human body, the brain tells us what’s going on outside our bodies (whether we feel cold or hot, for instance, or whether the person we see coming toward us is a friend or a stranger) as well as what’s going on inside our bodies (whether we have an infection or a broken bone, or whether we feel happy or sad).
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.
4. How many parts are there to the brain?
The human brain is split into 3 foremost parts: the cerebrum, the cerebellum, and the brainstem. The cerebrum is the largest part of the mind (approximately eighty-five percent of its general weight). It controls emotions, notion, reminiscence, and speech. it’s far divided right into a proper and left aspect, known as hemispheres, and each side is divided further into parts referred to as lobes.
It’s the thick outer covering, called the cortex, which is made from a sort of tissue known as gray be counted. The cerebellum coordinates the kinds of actions we don’t normally reflect on consideration on it allows us to stroll upright and in a straight line, it maintains us balanced so we don’t tip over, and it gives us coordination. The brainstem connects the mind with the spinal cord. It controls our body’s vital methods, consisting of respiration, digestion, and coronary heart rate.
5. The human body is everything that makes up
The human body is everything that makes up, well, you. What decides and regulates the physical form and function of the human body is our genetic information, however, external environments and behaviors can alter the way our bodies look and how well they function, according to Human Growth and Developments.
The human body is made up of all the living and nonliving components that create the entire structure of the human organism, including every living cell, tissue, and organ.
On the outside human anatomy consists of the five basic parts, the head, neck, torso, arms, and legs. However, beneath the skin, there are countless biological and chemical interactions that keep the human body machine ticking over.
6. How can you measure a heartbeat?
Doctors measure heart rate—the number of contractions of the heart (or heartbeats) in one minute—by taking a person’s pulse or listening to the heart with a stethoscope. Your heart rate can be taken at any spot on the body at which an artery is close to the surface and a pulse can be felt, such as the wrist or the neck.
When resting, the average adult human heart beats at about 70 beats per minute (for males) and 75 beats per minute (for females), although this rate is often less for athletes.
A toddler’s heart beats about 100 to 130 times per minute, while an older child’s about 90 to 110 times per minute, and an adolescent’s about 80 to 100 times per minute. If you add it all up, 75 beats per minute translate to 4,500 beats an hour, 108,000 beats per day, or about 39.4 million beats in a year!
7. How do people breathe in and out?
You usually don’t have to think much about your breathing because your brain controls it automatically. When you have a lot of carbon dioxide—the waste gas produced by body processes—in your blood, your brain gets the message and tells your lungs to exhale and dispose of it.
This action then causes you to inhale, drawing in air that eventually delivers oxygen to every cell in your body. This carefully regulated exhaling and inhaling take place about 10 to 14 times each minute when you are breathing calmly.
When you need more oxygen than usual, your brain takes care of that too. When you are exercising or working hard, your brain tells you to breathe more quickly, taking in 15 to 20 times more air. If that still doesn’t deliver all the oxygen that your muscles need, you may “run out of breath,” which forces you to rest. You will still breathe hard at that point—every second or so—until your muscles are able to work again.
8. Are the lungs connected to my voice?
Yes. The human voice, whether singing, speaking, or yelling, is made by a combination of factors. It all begins with air. Air from your lungs rushes through your trachea (also called the windpipe) and vibrates your vocal cords, a tiny, two-part muscle located in the larynx (also called the voice box) in your throat.
The pitch of the note depends on the distance between the vocal cords. If you almost close the space between your vocal cords, the result is a high-pitched sound. If you open the space, the result is a low-pitched sound. And the speed of your breath determines just how loud the note is. Your lips and tongue help to shape these sounds into speech and other expressions.
9. How much air does a person breathe in their lifetime?
During a person’s life, they will breathe about 75 million gallons (284 million liters) of air. Every minute, the human body needs 2 gallons (7.5 liters) of air when lying down, 4 gallons (15 liters) when sitting, 6 gallons (23 liters) when walking, and 12 gallons (45 liters) or more when running.
10. What is the human body’s biggest organ?
Your pores and skin is your frame’s largest organ and act as a barrier to the outside international. It covers your complete body and has a floor region of round 21. five rectangular feet (2 square meters). Its thickness stages from zero.02 inches (0.5 millimeters) to your eyelids to zero.16 inches (4 millimeters) or greater in “harder” regions, together with at the hands of your arms and the soles of your toes. In general, it bills for round 16 percent of your body weight. Your pores and skin protects your internal organs from contamination and helps manage body temperature.
Your pores and skin includes three foremost layers. The outer layer, referred to as the dermis, incorporates skin cells, pigment, and proteins. The middle layer, referred to as the dermis, incorporates blood vessels, nerves, hair follicles, and oil glands, and it provides vitamins to the dermis. The layer under the dermis, called the subcutaneous layer, carries sweat glands, hair follicles, blood vessels, and fat.
Each layer additionally includes connective tissue with collagen fibers to present support and elastin fibers to offer flexibility and power. Cells in the inner most layer of your epidermis are continuously dividing to make new cells, providing your pores and skin with a durable overcoat, which protects deeper cells from harm, infection, and dryness. Cells at the surface of your epidermis flake off and are continuously replaced with new ones so that about each 30 days your body produces a whole new set of pores and skin.
A human body sheds approximately six hundred,000 particles of pores and skin each hour—that’s approximately 1.5 kilos (0.68 kilograms) a year. by using age 70, a median human may have lost one zero five kilos (forty seven.6 kilograms) of pores and skin.
11. What causes a bruise?
A bruise is a common skin injury that causes discoloration of the skin, usually yellowish, brownish, or purplish spots. Blood from damaged blood vessels deep beneath the skin collects near the skin’s surface.
Resulting in a “black and blue” mark. You can get a bruise by bumping into something or someone, or by something or someone bumping into you.
12. Why do scabs form?
As soon as you scrape or break the skin anywhere on your body, special blood cells called platelets get to work. Platelets stick together like glue at the cut site, forming a clot. This clot is like a protective bandage over your cut that keeps more blood and other fluids from flowing out. The clot is also full of other blood cells and thread-like matter called fibrin that helps hold the clot together.
As the clot starts to get hard and dries out, scab forms. Meanwhile, crusty and dark red or brown, the scab protects the cut by keeping germs out. And giving the skin cells underneath a chance to heal. All by itself, usually after a week or two, a scab falls off, revealing new skin underneath.
13. What is pus?
Pus is a thick, whitish-yellow fluid that oozes from a wound because white blood cells, bacteria. And dead skin cells have accumulated there. Eventually, the white blood cells eat up all the bacteria and dead skin cells. And the pus clears up on its own.
Sometimes antibiotics are needed to kill off bacteria and help the wound heal more quickly. If a pimple gets infected with bacteria, the result is a pustule, or small amount of pus.
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