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    Home > Biochemistry News > Biotechnology News > Is hip size really good for fertility? Where does the hip come from and what does its shape do?

    Is hip size really good for fertility? Where does the hip come from and what does its shape do?

    • Last Update: 2020-08-09
    • Source: Internet
    • Author: User
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    In the animal world, sexual choice is a powerful evolutionary driver.
    so-called sexual choices, mainly females and males each prefer certain specific traits related to fertility or parenting and mate with individuals carrying them.
    means that these traits have a higher chance of being passed on to the next generation.
    However, does big buttocks really contribute to fertility? There is no definite link between the two in humans.
    in the chimps, a prominent, expanding buttocks represent the female's love affair and is willing and ready to mate.
    but for humans, the process of emotional ization is hidden from the inside rather than out, which makes us very unusual in mammals.
    perhaps in the depths of men, they still associate big asses with fertility.
    when do we start to distinguish oure from animals? Is it because of the heavy consciousness, or is it the beginning of fear of ourselves and everyone we love, who will one day die? Or is it just because of our strange big ass? The answer is: both are possible.
    While we spend a lot of time searching for the origins of human self-consciousness, there is no single monograph to study the role of our two buttocks.
    these two cloves of meat, some lush, some funny, some sexy, and at the same time bear the body accessories of everyday functions - where do they come from? What does their shape do? We interviewed some experts.
    they have gained insight into the evolutionary history and modern biological characteristics of human asses for a variety of reasons in their careers.
    this is a story that began 350 million years ago, when we had a large number of stout, primitive tails that disappeared over thousands of years of history, and that has led to the ergonomic evolutionary wonders we now sit on.
    Jason Bourke, a palaeontologist and an assistant professor of anatomy at the Arkansas School of Orthopaedic medicine at New York Tech, says the human hip structure is made up of hip muscles: hip muscles, hip muscles, and hip muscles.
    , the hip muscles determine the specific shape of the human buttocks.
    it extends down from our upper tibia (the hip bone of the pelvis) to the tail bone, forming a line.
    hip muscle close to the upper growth of the femur (thigh bone), the main implementation of leg extension muscle function, is the main driving force of the legs when running, climbing stairs, from sitting posture and other movements.
    when we need to make a big posture change, or need to move our legs quickly, we also need to activate the hip muscles as a power muscle.
    that's why sprinters and squat weightlifters tend to have very round, sturdy hips (i.e., "hips").
    because the muscles contract over a short distance, and it needs to produce a lot of force to move our legs.
    this makes the muscles very large, but because there is not enough space to place the muscles, the muscle fibers expand outwards, and due to gravity, it expands downwards, creating our iconic "chassis".
    the shape of our hips is almost unique to our species.
    When we evolved from quadrated apes to upright walkers, our pelvis underwent a radical change to support the weight of the entire torso.
    this requires a complete repositioning of our hip muscles, and our main leg stretch (hip muscle) is in a strange position that looks almost hanging on our pelvis.
    and other mammals have something we might call "butt cheeks."
    horses, for example, whose buttocks also show great evolutionary development.
    , like humans, well-developed hip muscles form a rounded horse butt.
    , however, unlike humans, this shape of a horse's hip is formed by the expansion of another hip muscle, the mid-hip muscle.
    in fact, for most mammals, large hip muscles are normal.
    and humans' unique development and expansion of the hip muscles are undoubtedly a response to the unique physical needs of our strange way of walking.
    Francois Therrien of the Royal Tiller Museum in Canada, the curator of dinosaur paleontology about 350 million years ago, the first four-legged animals to walk on land had large tails.
    one of their tail muscles, the caudofemoralis, connects the bottom of the tail to the thigh bone (femur), which their aquatic ancestors use to swim, and they can now use the muscle to pull the hind limbs backwards to help them move forward.
    evolved, the muscles were preserved in later animals and are still used by many animals, such as amphibians and reptiles.
    these animals usually have long, large tails because their walk depends heavily on the tail muscles.
    but the emergence of the ancestors of modern mammals, the synapsids, changed that about 300 million years ago.
    in these animals, the importance of the tail begins to diminish, and a different set of muscles help them exercise, the hip muscles.
    the muscles connect the hip bone to the femur, rather than attaching it to the tail bone.
    over the past hundreds of millions of years, the tails of the co-seiscasts have evolved smaller and smaller, and the tail muscles have gradually ceased to participate in walking (the first mammals evolved about 200 million years ago, their tails have become so small for the body that they are no longer used to walk), while the hip muscles have grown in size and formed hips.
    about 6 million years ago, the first human ancestors discovered the ability to stand upright (two-legged), a group of primates that no longer use forelimbs and walk entirely on the strength of the hind limbs as they move.
    this shift means that all the forces needed to move forward (e.g. walking) must be produced entirely by the hip stoic, so the hip muscles become larger and more prominent.
    , the buttocks also form a layer of fat pads for "buffering" so that the hip muscles do not evolve to develop your current "ass" because of friction alt-bone friction while walking or sitting.
    that's why you can't find "ass" in dinosaurs or non-human mammals: the former still uses tail muscles attached to the tail, while the latter walks in four feet.
    Kirsten Brown, An assistant professor of anatomy and regenerative biology at the George Washington School of Medicine and Health Sciences, the first thing we need to know is that humans are the only primates that use two-legged walking.
    gorillas and chimps can walk two feet in a very short period of time, but not to the extent that we humans do.
    we can also find differences in anatomical structures due to various behavioral differences.
    human pelvis is horn-shaped.
    the upper part of the pelvis, called the tibia, is on one side of the body.
    and in apes, these bones face the back.
    in the absence of further study of the evolutionary theory of bipedal animals, it is important to remember that, ultimately, different bone orientations are different muscle functions and different movement postures.
    For humans, the basic attitude of action is the two-legged walk, using two-legged support and one-legged support alternately.
    most of the time you walk, about 75 percent of the time, the body is supported by one leg.
    In order to do this, you need to move a lot of muscles to maintain stability and support, including hip muscles, which help the hips form the shape they are now. The largest of the
    hip muscles is the hip muscle, which occupies a large part of the area, extending from the pelvic area (i.e. the hip bone) to the femur (i.e. the bone in the root of the thigh).
    its size is not only reflected in the size of the area it adheres to, but also in its thickness, which plays a major role in slowing down the lower limbs and stabilizing your torso.
    you certainly won't want your torso and upper body to move faster than your lower limbs, because that way you'll fall.
    hip exomes are another part of the hip that is used to prevent so-called pelvic tilt.
    If you stand on one leg, your pelvis is nearly horizontal.
    hips shrink on your standing legs to prevent the pelvis from falling to the other side.
    it doesn't seem to matter, but it's different for those with muscle injuries.
    , for example, in people with Trentenberg gait, the swaying gait seen in hip paralysis, their muscles are damaged, or more commonly, the nervedamage that governs these muscles prevents them from maintaining pelvic stability while standing on one leg.
    so they automatically swing their bodies and torso sharply to prevent falls.
    Susan Larson, professor and chair of the Department of Anatomy at the State University of New York at Stony Brook, is characterized by a large muscle that is aptly named the hip muscle.
    it is the largest muscle in the anatomical structure of the human body, and its size and structure are very unique compared to our primate cousins. The role of the
    hip muscle is to stretch the thigh (i.e. to stretch back), and its large size is mainly related to the characteristics of humans standing on the thigh, with greater ductility than other primates, and we are able to stretch it further on the vertical surface.
    the strength of the hip muscle is important in running, climbing stairs, and standing up from sitting.
    , buttocks have more fat than you think, and these fats help shape the contours of the hips.
    some people think it may be due to sexual selection, that is, we think a rounded hip is more "sexy."
    this is, of course, speculation, and it's hard to prove it in a definite way.
    Jason J. M. Ogan (Jason M.
    ) Indiana University School of Medicine, assistant professor of anatomy and cell biology, the human hip muscle no longer moves the thigh back in the hip, as other apes do.
    , instead, they cause the thighs to spin outwards from one side of the body. This new movement
    hip muscles is essential to avoid falling while walking on both legs, but it reduces the number of muscles that move the thigh slower, which is an equally important move to move the body towards walking.
    that's why the hip muscle is so big: it has to make up for the loss of two other muscles that do the same! Of course, none of these explanations take into account the possibility that our ancestors liked big asses (they proved to be not lying).
    perhaps the human ancestors thought the potential spouse's "farts" were attractive, which affected the size of our hip muscles as we evolved.
    Daniel J. E. Lieberman (Daniel E.
    Lieberman) Harvard University's Department of Human Evolutionary Biology, the author of The Human Body Story, if you're referring to the muscle part, the answer is to watch the run.
    the muscles that make up the contours of the hips are the hip muscles (yes, the largest in the human body), and the upper part (top) of the human buttocks is much larger than that of apes.
    we rarely use it when we walk, but when we run, it plays a key role in controlling the torso, controlling the back stretch of your legs and slowing down the movement of the legs that you stretch forward. interestingly
    , we can see from the fossil record that this muscle expansion occurred 2 million years ago and was born with the evolution of Homo erectus and the emergence of endurance runs.
    another key component of our hips is fat, and even the thinnest people have more hip fat than other mammals.
    because we need more fat to maintain our energy-intensive reproductive processes and energy reserves.
    Steven Churchill, a professor of human evolution at Duke University, where our ancestors evolved into fixed bipedals (i.e., used to walking on two legs), the pelvis became short and wide, so two smaller hip muscles, mid-hip muscles and hip muscles, moved to both sides of the body to help us stabilize our pelvis as we swayed forward with one leg and the other leg forward.
    these muscles act as a boost in apes, but in our bodies they play a balancing act.
    , we've grown that larger hip muscle: the hip muscle, which acts as a propulsion muscle as we run, climb, or climb stairs.
    these enlarged hip muscles give humans a unique hip shape.
    /Daniel Kolitz/Wolibanat School/Gyzmodo.com/why-do-we-have-butts-1826004199 this article is based on the Creation Common Agreement (BY-NC), published by Wolibanat in Leviathan Source: Leviathan Public.
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