What is Human body: Definition and 132 Discussions

The human body is the structure of a human being. It is composed of many different types of cells that together create tissues and subsequently organ systems. They ensure homeostasis and the viability of the human body.
It comprises a head, neck, trunk (which includes the thorax and abdomen), arms and hands, legs and feet.
The study of the human body involves anatomy, physiology, histology and embryology. The body varies anatomically in known ways. Physiology focuses on the systems and organs of the human body and their functions. Many systems and mechanisms interact in order to maintain homeostasis, with safe levels of substances such as sugar and oxygen in the blood.
The body is studied by health professionals, physiologists, anatomists, and by artists to assist them in their work.

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  1. S

    I Moment of inertia of human body with limbs at an angle

    I'm trying to find the moment of inertia of a human body with (say) the upper arm at angle alpha to the torso and the lower arm at another angle beta, where beta is the angle between the lower and upper arms. I model the torso as a cylinder of radius R, mass M and the parts of the arm as...
  2. curiousTrys

    Surviving in Space: The Truth About Human Adaptation and Evolution

    I want to know the answers to the following: 1. What REALLY happens to the naked human body in the void of space (the areas far between galaxies, where nothing really exists)? 2. Can humans evolve and adapt to survive in space? 3. (Adding on to the previous) can we slowly depressurize (akin to...
  3. D

    B What Would Happen to the Elements in the Human Body If Teleported to the Sun?

    The human body is made up of mostly oxygen, hydrogen, nitrogen, carbon, calcium, and phosphorus. Less than 1% is sulfur, potassium, sodium, chlorine, and magnesium. If a human body was teleported to the surface of the sun, what would happen to these elements? Which ones would cease to exist...
  4. M

    Is there a way to use the hydrogen in the human body?

    I recently read that there is enough hydrogen in the human body to lift 195 lbs off the ground. I know this sounds super-silly but if we ever develop nanites; could they manipulate the hydrogen and allow us to float?
  5. freelooooo

    How does Cmax decrease over time in human body? Use half life?

    I'm interested in chemistry but it's all new for me and I'm just starting out. I tried to do some calculations but got stuck... I was wondering, for example a supplement has the following values: Molar mass: 306.247 g mol-1 Tmax 2-4 hours Cmax 363.3 ng / ml Half life: 11.21 hours How do...
  6. P

    Can the human body produce EMPs?

    I'm sure this is a strange question, but I am really curious as to whether the human body can produce electromagnetic pulses. And particularly, whether an orgasm is a type of EMP. Wikipedia says an orgasm is "a sudden discharge of accumulated sexual excitement". So is this discharge of...
  7. Q

    Wanting to study energy in the human body

    Summary:: Looking for a certain degree program What kind of degree would be best if I really wanted to get into studying energy within and around the human body and interactions of it between electronic signals and things like that? I am really starting to believe that our understanding of...
  8. J

    A question about resistance in the human body

    Back in grade 10..,.( Oh my that was awhile back 😀 ) our electronics teacher passed around a multimeter and everyone measured their resistance ( a lead held in each hand, Fluke was set on infinite ). All in the class measured between 700K and 800K approx. All except me that is. I measured 1.4M...
  9. S

    How can a human body create such effects on a freezing cold winter day?

    I was in doubt if this is the right chapter to place this thread, but it seems there are many talents just here. "we were observing from a decent distance through optics. The weather was frosty, clear, calm. When хххххх appeared from under the arch of the house (he was хххххххх to walk to the...
  10. T

    I Are Peak Moment and Peak Torque Equivalents in Biodex Dynamometry Measurements?

    Apologies if this is in the wrong section as it isn't particularly medical in nature despite it being about the body. I am currently conducting a rapid review with outcomes of knee muscle strength. This is measured by biodex dynamometry, which assesses numerous values including Peak moment...
  11. Doma Noemi

    Electricity in the human body -- Is there enough to power a prosthesis?

    Can we use the electricity from the muscle to power an engine (like a prosthesis)?
  12. PainterGuy

    Human body growth in the absence of a brain

    Hi, Does the brain control the physical growth of a human baby? I think if, for some unfortunate reason, the brain is absent, the growth would still take place normally but more like a vegetable. I don't think if the brain is absent, one can even blink the eye or move a finger. But the...
  13. N

    What is the impedance of the human body and why does it vary?

    I was researching what the total electrical resistance of the human body was and got some quite far ranging values. It seems to range from 1, OOO to 1OO,OOO ohms. Some quite elaborate ways of testing it too. Then I thought I'd just get the old multimeter out. I have two and both measured about...
  14. Nathan M

    Understanding frequency calculations of an object (e.g human body)

    Apologies for the noob question. The frequency of the human body can be calculated based on weins law as follows: Wavelength = 0.002898/310 = 0.00000934838 m Plugging this into the equation λν = c we get frequency = 299792458 / 0.00000934838 = 32069 Ghz Elsewhere, I see that the resonant...
  15. Tony Hau

    B Can the human body affect a radio receiver?

    So I discover that a human body can affect a radio receiver. When I get close to a receiver, the radio produces buzz sound, which means that the radio signal is disturbed. However when I touch the plastic case of the receiver, the receive becomes normal. This phenomenon does not happen every...
  16. S

    Human Body Systems Music Video

    I am a high school science teacher working on arts integration for thirty years in schools where many students have academic skills below grade level. I am looking for feedback.
  17. Dr. Courtney

    The Human Body as a Dark Matter Detector

    https://www.sciencedirect.com/science/article/pii/S0370269320301040#br0210 I need to give this more thought, but the ballistics section is pretty good, and I think their basic dE/dx argument is sound: If a collision at a ballistic rate transfers about the same kinetic energy to the human body...
  18. T

    Are additives and preservatives in food bad for the human body?

    Hi I would like to know the facts about this
  19. José Ricardo

    (Biophysiscs) Failures of the human body

    https://translate.google.com.br/translate?sl=pt&tl=en&js=y&prev=_t&hl=pt-BR&ie=UTF-8&u=https%3A%2F%2Fmisteriosdomundo.org%2Fessas-sao-as-7-falhas-que-o-corpo-humano-possui-em-sua-estrutura%2F&edit-text=&act=url What do you guys think about this article? Is there some error? Or the article is...
  20. curiousman

    Electrical current through the Human Body

    Hi lads, I couldn't find this info on Google... Are the Heart and Brain the only organs which physiological functions are based on electrical impulses? What happens if we apply electrical current through other organs? Thanks
  21. T

    Is the human body a heat engine?

    If this is a valid enough definition of a heat engine: All heat engines transfer heat energy from higher to lower temperatures, and do work in the process. ... then is the human body a heat engine?
  22. F

    Medical Heating of the Human Body and Radiation Wavelengths

    Hello Everyone, Sunlight is composed of UV, visible and infrared (IR) over a wavelength range from ~290nm to ~2500nm. When we are exposed to sunlight and feel hot, is it because of the absorption of energy at the visible wavelengths and FIR, i.e . infrared wavelength much larger than 2500nm? I...
  23. ISamson

    Salt vs Sugar: Which is More Harmful to the Human Body?

    During these days, I have asked my mother: What is better/worse for the human body: salt or sugar? Both of these substances are quite dangerous in high amounts, but which one is worse? Salt was used in food preservation, with its abilities (Which abilities? I have never understood this...) and...
  24. S

    No sublimation for human body in vacuum? [Thermodynamics]

    In my Thermodynamics course, we recently learned about the saturation pressure and saturation temperature of different substances -mainly water. As you know, the saturation temperature at which a substance begins to boil is specific to a fixed saturation pressure. Water only boils at 100...
  25. F

    Biomechanics, center of mass of human body and balance

    Hello everyone, I know that the any object, human body included, when the vertical line from its center of mass to the floor falls outside the base of support, topples under the influence of gravity: the force of gravity produces a nonzero torque that rotates the body. Is the human body able to...
  26. L

    What types of light can safely pass through the human body?

    What types of light are able to pass through the human body without causing damage to tissue or individual cells? Are there any truly safe alternatives to x-rays that could allow doctors to see internal body parts but not cause damage from extended exposure?
  27. F

    Atmospheric air pressure on the human body

    Hello, It is well known that the atmospheric air pressure is significantly strong but our body does not get crushed by it because and equal pressure pushes from the inside our body. That said, does it mean that air can exist and be diffused inside solid organs like the lungs, our heart, etc...
  28. M

    B Can Increasing Human Body Density Enable Breaking Rocks by Hand Compression?

    Hello, I've been watching too much anime. I know that isn't the best way to ask a question scientific in nature, but visualizing bizarre situations is one of the best ways to come up with interesting questions. Anyways, in order to break a rock by compressing it with your hands, you would need...
  29. Kunal Aggarwal

    Medical How nanotechnology has affected treatment of tuberculosis?

    To be more precise, which nano particles are being used or can be used to deliver tuberculosis drugs in the human body?
  30. I

    Desalination of water and its effect on the human body

    I have been thinking, looking for an answer. It is known to me that drinking pure H2O is bad for the body, reason is it saps all of the minerals from the body since it does not contain any. I have been thinking, if I take salt water from a certain sea, put it in a container and boil the water...
  31. Daniel Travis

    Artificial gravity -- consequences for the human body

    Hey all, *this is my first post on this forum* I've read a lot about the different ways of artificial gravity on this forum, and we've discussed everything from realistic ideas that can be accomplished with today's tech, all the way to fictitious situations in sci fi books. BASICALLY, I would...
  32. harini07

    What enzyme is responsible for the initial step in milk digestion in humans?

    Homework Statement The intial step in the digestion of milk in Humans is carried out by which of the following enzymes? A) lipase B) trypsin C) rennin (No, not renin) D) pepsin Homework Equations Casein is converted to Paracasein by rennin and then paracasein along with calcium is acted upon...
  33. Avatrin

    Physical properties of materials in the human body

    I am looking for resources on the physical properties of the various components that make up the human body. As an example of what I am looking for; If we look at the finger, we know it has bones, skins, nails, blood etc. What are the various physical properties of these different parts...
  34. D

    How can you measure frequencies in the human body?

    I read posts from a few years ago regarding measuring frequencies in the human body. I am wondering if there are any new developments. What devices can measure frequency? Thanks!
  35. S

    Frequencies -- what is the average frequency for the human body?

    Hi all, Would anyone be able to let me know what the average frequency is for the human body? Also, what is the average frequency of a home? What would be considered abnormal? According to the Ofcom UK Frequency Allocation Table it notes different frequency uses e.g. a frequency of 1,600...
  36. M

    Magnetisation ratio in human body using gyromagnetic ratios

    Homework Statement The number density of 1H nuclei in the body is roughly 600 times greater than that of 13C nuclei. By what factor is the magnetisation M0 of 1H greater than 13C in the same external magnetic field? Homework Equations 3. The Attempt at a Solution [/B] Surely it can't be as...
  37. N

    I How hot will a human body burn?

    A curious question that's come to my mind, as I'm doing a little research for game development, aiming for realism here. Assume you have a human corpse, not doused in any special kind of fuel, but wearing cotton/polyester clothing. And you set it alight, to slowly burn over time. I've heard of...
  38. H

    How much atmospheric pressure is exerted on the human body?

    I understand that this will vary from human to human, but how much weight is exerted, in total, on the average adult human body. It would be very much appreciated if the calculations can be shown. Thanks!
  39. F

    Comparing Human Body and Ham Spoilage: Exploring the Science Behind Decay

    Ham goes bad if you leave it there for a few days but why doesn't human body goes bad if you leave it there for a few days and when the person is alive?
  40. M

    Human Body and Frequency detection

    Is the Human body capable of creating any type of frequency ? Of course vocally but beyond that ... . What devices are in existence that can measure or see frequencies of living things ? Have there been experiments with documented results that shows frequencies created by the human body ?
  41. Zephyr007

    Becoming a Doctor: What Course & Prep Do I Need?

    One of my favorite dreams is to be a doctor but I don't know where to start. I love studying the human body and do experiments to my own body (but not to the point where my experiments hurt). What course do I need to take and how do I prepare for it?
  42. Pyrus

    Why do some people sneeze on exposure to light?

    Why do some people sneeze on exposure to light?
  43. praveena

    Which is the maximum speed that our human body can bear?

    The astronauts who were traveling to the space. in what way their health were affected? During the rocket launch the spacecraft should travel greater than the Earth's escape speed. Is this speed affect the astronaut? And tell me which is the maximum speed that our human body can bear?
  44. S

    What changes does human body exert when it enters a room ?

    I am making home automation model and I have few sensors installed to sense some changes in the environment to detect any changes. So these sensors provide me data , but I want to know what changes does Human body exerts on the environment it enters, so that I can install those sensors which...
  45. G

    Bacteria in the human body: when we die and when we are born

    It is said that around 90% of the cells in a human body are symbiotic bacteria living thanks to us. When we die, do most of them also die? Or do they manage to survive without us and find a new 'home human'? And opposite, when and how do we get all those bacteria after conception? Do we get...
  46. G

    Why does the human body need such a high temperature?

    If our body temperature falls below 30 degrees C or so, it stops functioning properly and we die. 30 C seems still a rather warm temperature for normal chemical reactions to be able to occur, and in most environmental conditions inhabited by men it still represents a temperature gradient...
  47. TrueGormagon

    Can Humans Boost Their Strength with Iron-Infused Skeletons?

    Greetings. Well I do not have enough time to pose all of my questions and ideas I can get this thread started off. So let's get right into it. The teeth of a Beaver incorporate a comparatively high percentage of iron in their construction, making them very strong and orange hued. (Also made to...
  48. I_am_learning

    Finding a Precise Scale for Measuring Human Body Weight Fluctuations

    I was lately interested in learning how the human body weight changes through out the day. Like, how much weight (may be in just 10s of grams) is lost during sleeping, after bathing, after workout and like that. For that I would require a highly precise scale. But most commercially available...
  49. M

    Does human body capacitance change when floating vs. standing?

    Hello guys, I read some articles recently about how touchscreens work by using the capacitance in human bodies. I'v seen the human body capacitance is quoted at around 100pf, is it the same when the human body is floating in mid-air, as if it is standing on the ground? My goal is to detect...
  50. aditya ver.2.0

    Why doesn't our body experience equal pressure when we press our finger?

    According to Pascal Law, when there is an increase in pressure at any point in a confined fluid, there is an equal increase at every other point in the container. Then why doesn't our entire body experiences the same pressure throughout the body when we press our finger. Isn't the entire body...
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