Questions tagged [human-anatomy]

This tag is for questions about the general anatomical features of human beings as opposed to the anatomy of non-human animals.

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12 views

Surface perception

I'm looking for research studying: How small and compressed together do particles of a surface need to be to be perceived as solid surface to human touch? E.g. sand still feels grainy. Has there been ...
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Difference between intervertebral and vertebral foramina

In the human spine, what is the difference between intervertebral and vertebral foramina? Is it just a matter of perspective and do they refer to the same thing or are they different?
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Are your finger muscles and tendons interconnected?

Are finger muscles and tendons interconnected? If they are interconnected, then if i exercise one finger will it train the other fingers since they are interconnected and share the same muscles in the ...
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27 views

Does any tendon in humans receive a high amount of blood supply? Or is the property of not receiving a large blood supply a constant across tendons?

I read on https://www.physiocomestoyou.co.uk/blog/all-you-need-to-know-about-tendons/ (mirror): [Tendons] do not have a large blood supply. Does any tendon in the human body receive a high amount ...
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1answer
186 views

What's a “constitutionally small penis”?

I'm reading some urology papers and came across one involving penis growth (Kim & Song, 2008); here's an intro passage that I'm confused about: A total of 58 patients with constitutionally ...
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Is the morphology of the insertion of the gluteus minimus to the greater trochanter acquired or innate? If acquired, what are the factors?

{1} noted two different morphologies for the insertion of the gluteus minimus to the greater trochanter: Two morphologies noted: The majority (11/14) were long, thin, and crescent shaped and ran ...
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1answer
34 views

How many different states can the femur and lower limb be in?

Often the knee can be thought of as a hinge joint. However, when it flexes, the knee permits the lower leg to rotate. So it is not a pure hinge joint in absolute sense because it permits more range of ...
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1answer
61k views

I'm 20. Can I still grow taller? [closed]

I'm 20, in about 6 months I turn 21. For some time I've been wondering whether there are natural, non-surgical and non-pharmaceutical ways that humans can continue to grow after reaching adulthood. ...
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42 views

Movement of the Thoracic Cage During Movements of the Thoracic Spine

Just for a bit of context: I am trying to create a 3D digital model of the human skeleton as the first step towards computer generated muscle simulation, and as such I want the skeleton to be as ...
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36 views

ATP and Muscle Contraction

I have a question regarding how molecular interactions manifest in physical actions - such as hanging from a bar. To the best of my understanding, when it comes to the contraction of muscles, ATP is ...
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116 views

In endochondral bone formation, why does only hyaline cartilage get ossified to form bone?

There are three types of cartilage: hyaline, fibrous and elastic cartilage. Fibrous cartilage does not have perichondrium...so it does not take part in ossification because perichondrium needs to ...
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1answer
75 views

How correlated are the lengths of tendons in different part of a human body?

How correlated are the lengths of tendons in different part of a human body? E.g., if the we consider two humans, A, and B. Human A has a patellar tendon of length 2 cm, and human B has a patellar ...
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20 views

For how long can the heart be in asystole and then restart itself?

The medication Adenosine is used for the treatment of some abnormal heart rhythms. However, according to Wikipedia, it can cause asystole for a few seconds: Because of the effects of adenosine on ...
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10k views

Why does the ring finger not move independently?

Why is it that we need to move little finger in order to move ring finger with it? For example, put your palm on a table and fold your middle finger inside. You won't be able to move your ring finger ...
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1answer
39 views

Passing out from drowning [closed]

How long does it take to pass out from oxygen deprivation? The person is panicked and screaming so they accidentally breathe water into the lungs. So how long would it take for them to pass out? After ...
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2answers
10k views

Do women tend to have longer legs and shorter torsos than men?

I've always heard that women tend to have a greater leg length to torso length ration than men, and I think that my anecdotal observations of pedestrians of both sexes tend to confirm that. However, ...
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For each movement performed by both the gluteus minimus and medius, what percentage of the movement do the gluteus minimus and medius account for?

From what I read on Wikipedia, all functions of the gluteus minimus are mirrored by the gluteus medius. Additionally, the gluteus medius is larger than the gluteus minimus (see comparative images here)...
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1answer
796 views

What is the distance between the insertion of the distal end of the bicep tendon and the head of the radius?

I was unable to find a source that could provide a measurement for the distance between the insertion of the distal end of the bicep tendon and the head of the radius. Does anyone know a source that ...
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1answer
27 views

Does a full tear of the gluteus minimus tendon has any functional implications?

From what I read on Wikipedia, all functions of the gluteus minimus are mirrored by the gluteus medius. Additionally, the gluteus medius is larger than the gluteus minimus (see comparative images here)...
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1answer
34 views

Does a full tear of the gluteus minimus tendon result in a long-lasting inflammatory response?

Does a full tear of the gluteus minimus tendon result in a long-lasting inflammatory response? This answer mentions: An isolated gluteus minimus tear still causes functional problems because of ...
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2answers
6k views

Are tendons and ligaments classified under the muscular or bone system?

Are tendons and ligaments classified under the muscular system or the bone system? Basically they are not bones or muscles and that's why I have doubt.
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3k views

Where can I find the list of all tendons in the human body?

https://www.healthcentral.com/article/aging-can-take-major-toll-on-womens-tendons (mirror) claims that: There are about 4,000 tendons throughout the body. This claim is echoed by a fair amount of ...
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1answer
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What are the side-effects of long-term liquid breathing?

I just saw a recent Physics question that mentioned liquid breathing (which I had never heard of before) and I started to wonder about its long-term effects. Let's imagine a person underwent liquid ...
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1answer
30 views

What's the subpatellar tendon?

I read in Thomas Myers book Anatomy Trains: Although the muscles themselves have attachments within the anterior compartment to the tibia, fibula, and interosseous membrane, the next station ...
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81 views

What is the significance of different types of papillae present on tongue?

Fungiform, Circumvallate, Filiform, Foliate Papillae are present on the surface of the tongue. They have a role in increasing surface area for taste buds that can be accommodated on the tongue. Each ...
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1answer
130 views

Why we can't feel our internal organs? [closed]

We have lungs,kidneys, stomach etc.But why we can not feel them consciously?
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20k views

Can any other animal choke on food?

I read somewhere (I think it was Bill Bryson's book on the origins of the English language) that of all animals, we are the only ones that can choke on food (having something to do with how our larynx ...
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12 views

Is occipital ridge a synonym for the inferior nuchal line?

I'm reading different sources about anatomy and it seems to me like occipital ridge is a synonym for the inferior nuchal line but I'm not sure. Is it, or does the term occipital ridge refer to a ...
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63 views

Do cells in healing ligaments or tendons have deformation processes? If so, what are they?

I am trying to better understand how non-muscle tissue in the muscuoloskeletal system heals. Specifically, I am interested in how ligaments or tendons heal once torn. I read the following text: ...
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3answers
932 views

Is there any stem cell or biogel method that exist for muscle and tendon lengthening?

Is there any stem cell or biogel method that exist for muscle and tendon lengthening? It is known that height surgery is limit to six inches with two surgeries and three inches each, it is also true ...
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1answer
305 views

Why is the central tendon of diaphragm called a tendon?

Why is the central tendon of diaphragm called a tendon when it does not connect the diaphragm to any bone?
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42 views

Is the tendon width determined by genetic predisposition, and if so, is genetics the sole factor?

Tendons' widths vary widely across humans. E.g.: {1}: "the mean patellar tendon width was 26.10mm (SD = 3.31; range 18.33mm-33.33mm)" {2}: "Size of the patellar tendon width, measured at the same ...
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How does shoulder rotation work when the arm is overhead?

Anatomy references state that the humerus is externally rotated by infraspinatus, and teres minor, and internally rotated by subscapularis. All the illustrations I can find of these muscles have the ...
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1answer
118 views

Where does the gluteus medius attach to the greater trochanter compared to the gluteus minimus attachment?

Where does the gluteus medius attach to the greater trochanter of the femur compared to the gluteus minimus attachment? Is it above, below, next to it, etc.? Ideally I'd like to know the distance as ...
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1answer
171 views

Are there certain symmetric-pair muscles that are slightly bigger and NOT due to handedness?

Ok, hear me out, I was just thinking about an article in Nature I read in the past titled "Scrotal asymmetry in man and in ancient sculpture"$^{\dagger}$ and more recently an entire medical textbook ...
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1answer
26 views

Is “muscular attachment” synonymous to tendon? (when talking about the insertion of glutei medius and minimus to greater trochanter of the femur)

I have read the following two terms in an MRI report (both points refer to the insertion of gluteus medius/minimus to greater trochanter of the femur): mild degeneration of the muscular attachment ...
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2answers
37k views

Difference between Appendix and the Cecum?

What's the difference between an appendix and a cecum, and what are their functions?
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25 views

Why different people have different Sympathetic reaction

We all know that sympathetic mechanism is similiar in humans . Why people react differently for example one may ran after seeing a lion while other may keep standing or may shout without escaping ?
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1answer
84 views

Do the left half and right halves of the diaphragm undergo the same displacement during breathing?

Do the left half and right halves of the diaphragm of a normal person move exactly the same distance between inhaling and exhaling?
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1answer
109 views

Prostate, seminal vesicles or testis which one is bigger(by volume and size)? [closed]

I can't understand this by looking at these photos, especially the last picture makes me more doubtful. Do you know which of them is the biggest one by volume? Another question is, what is the ...
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2answers
294 views

What is the difference between “hamstring tendon” and “common hamstring tendon”?

What is the difference between "hamstring tendon" and "common hamstring tendon"? I have seen both terms being used but I don't know whether they referred to the same tendon. For example, Johnson, ...
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How do viable sperm persist for weeks?

Tests on men who have undergone vasectomies show viable sperm in their ejaculate weeks and dozens of ejaculations after ligation of their vas deferens. How is this possible? How long does a ...
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1answer
631 views

Why hand washing causes skin to dry?

This seems counter intuitive: dry hands mean low humidity, so why when humidity is increased, by washing hands, they become even more dry, eventually? In particular, why such hand dryness is usually ...
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1answer
3k views

Are males taller than females in humans?

Is there any scientific evidence that in humans males are taller than females? And if so, what is the reason that they are taller (please include genes or hormones that accounts for human growth and ...
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1answer
51 views

How atom works and it's different from DNA? [closed]

I am studying atoms recently because I am writing a short story and the characters would talk about it for a bit. And I wish it's scientifically accurate. So I read a lot of articles about the atom ...
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0answers
633 views

Does the humeroradial joint move medially/laterally?

The humeroradial joint is a ball-and-socket joint that, if unrestricted, would allow for movement around all possible axes. However (as succinctly stated from Wikipedia): the annular ligament, by ...
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3answers
251k views

Why do I only breathe out of one nostril?

I was just sitting with my hand next to my nose and I realized that air was only coming out of the right nostril. Why is that? I would think I would use both, it seems much more efficient. Have I ...
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2answers
2k views

Terminology for parts of the leg

Going out on a limb here (pun intended)...I'm writing a paper in which I need to refer to various sections of the human leg from upper thigh to knee to calf and ankle. However, "calf" covers a fairly ...
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11 views

What soft tissue separates bones of toes?

I need to know a little about the "knuckles" of toes; specifically the 4 areas that separate the 5 proximal/metatarsal joins. I'd like to know the terms for areas that might be damaged if the width ...
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1answer
14k views

Why don't we have hair on palms?

We have hair all over the body except palms. What is the biological reason behind this?