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20 votes
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Why is BMI related to the square of height?

It turns out the answer to this is fairly simple, and but not terribly easy to find. In the 1800s a Belgian named Adolphe Quetelet (1796–1874) performed some statistics on the weights and heights of ...
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13 votes

Why is BMI related to the square of height?

BMI isn't a "real" thing, it's an arbitrary measure meant to capture some aspect of "overweightness". The exponent has traditionally been chosen as "2" because that ...
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7 votes
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Resources for human anatomy

TeachMeAnatomy Containing over 700 vibrant, full-colour images, TeachMeAnatomy is a comprehensive anatomy encyclopedia presented in a visually-appealing, easy-to-read format. Created by a team of ...
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6 votes
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Could a high TSH level mean a problem with the pituitary gland?

When a physician is studying someone for a suspected disorder related to the thyroid hormones, he/she should not only study the thyroid, but evaluate the hypothalamus-pituitary-thiroid endocrine axis ...
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6 votes
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Do uteruses return to their original size after a full-term birth or are they slightly bigger than one that's never grown?

Does the uterus return to its original (pre-pregnancy) size after a full term birth? Good question. No. Uterine involution, the return of the uterus to the nonpregnant state postpartum, does involve ...
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5 votes
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What does "parenchymal organs" mean?

Parenchyma is functional tissue, i. e. tissue that has a specific function. Organs are built from functional tissue and connective/structural tissue (stroma). In the kidney this is e. g. Gerota's ...
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  • 1,157
5 votes
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How do I specify a particular side of a finger?

In general in these situations the medial/lateral terminology is used, however in case of hands/feet due to the ability to pronate and supinate this might lead to confusion, therefore specific terms &...
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  • 709
5 votes

How do I specify a particular side of a finger?

One may use anatomical terminology as in if the injury is on that side of a digit which is near to the midline then one may say that the medial side of fourth finger was injured. The other side which ...
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  • 1,020
5 votes

Where do I find an interactive 3D model of the human anatomy?

I like the 3D atlases of https://www.openanatomy.org/atlas-pages/. You can remove anatomic structures and transact the body as if you're looking at CT-scanning images. They are great if you also want ...
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  • 238
4 votes
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Calculate blood coming out from cut blood vessel per minute

You can use the formula for blood vessel flowrate by accounting heart rate and radius using flow rate formula: Q=ΔP/R Wherein; flow rate (volume/time); ΔP = pressure difference (mm Hg); and R = ...
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4 votes

Resources for human anatomy

Gray's Anatomy - an old but complete online book with detailed text and pictures. Get Body Smart - by organic systems, at a glance Inner Body - on hover interactive images, with text KenHub - 50 ...
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3 votes
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Does blood pressure have a daily pattern?

"Daily patterns" in biology and medicine are referred to as "circadian" - circa means "around" or "approximately", and "dia" refers to "day" - "approximately daily". Yes, as the Mayo Clinic site ...
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3 votes

What is the distal portion of the ribs?

The part of the ribs that articulates with the thoracic vertebrae (in your spine) is called the proximal end and the part that articulates with the costal-cartilage / sternum (in the centre of your ...
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3 votes
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Supracondylar Fracture to the Humerus

Nerve injury in supracondylar fractures of the humerus Supracondylar fractures of the humerus are the most common type of elbow fracture in children. Both median and ulnar nerve injury can occur ...
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2 votes
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What would be the impact of taking a 1 cell thick slice down the middle of a person

Adding to the above answer, the most immediate fatal events are: While you can cut the corpus callosum effectively separating R/L cerebral cortex without killing the person, splitting your midbrain/...
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  • 5,694
2 votes

What would be the impact of taking a 1 cell thick slice down the middle of a person

A person is not a loaf of bread, but a network of organs at various positions that depend upon each other. What you are basically asking, would damage some organs by cutting them in half this ...
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2 votes

What is the name for an underdeveloped MCP joint in the thumb?

I think you are referring to thumb hypoplasia. Or more specifically thumb hypoplasia Type II. It restricts the movement of the thumb. It is a congenital disorder. The cause is still unknown, maybe ...
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2 votes

Lesion of the Nn. fibulares

This anatomy site doesn't provide reputable citations, but I don't see any obvious inaccuracies and it has a reasonable section on potential clinical presentations of superficial fibular nerve ...
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2 votes

Abnormal shrinkage of the eyeball

Atrophia bulbi (with shrinkage) It occurs with shrinkage and also without shrinkage. In without shrinkage, generally the eye is of normal size, but the globe can be enlarged due to glaucoma. In with ...
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2 votes
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Where might "Counter side Ax" be located? (Description of tumor location)

Contralateral (opposite site) is the opposite of ipsilateral (same side) in anatomical terminology. In looking for references for this, I found "counter side" used in place of "contralateral" ...
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  • 5,694
2 votes

How much electromagnetic radiation applied to skin will cause pain?

As @Carey says in his comment, measuring pain is very subjective to the individual, and their reporting of pain levels. It doesn't have any way of scientific measurement. Wikipedia has a list of '...
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  • 1,523
2 votes
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Good popular informative video guides to human anatomy?

Free videos with subtitles: Introduction to Anatomy: basic anatomical terms, planes, positions, directions..a single 20 min video Kenhub, comprehensive, organized, with basic anatomical terms, ...
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2 votes
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What is the difference between Nasion and Root of Nose?

Radiopeadia helps with locating the nasion. The nasion (also known as bridge of the nose) is the midline bony depression between the eyes where the frontal and two nasal bones meet, just below the ...
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  • 5,872
2 votes

Why is BMI related to the square of height?

While the answers of Bob and Bryan are perfectly valid, let me attempt to provide some intuition from a physics/statistics standpoint. Generally, when a quantity is proportional to some other quantity,...
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1 vote

Anatomy: name of the crease between leg and groin

It also called inguinal crease and love line ...it denotes the inguinal canal and attachment of inguinal ligament ..also it is the junction of abdomen and thigh in either side
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1 vote

Anatomy: name of the crease between leg and groin

That crease is simply called the crease of the groin. [See: fig.1 of Mallouris et al. (2012).] Other names for this crease, as also indicated in the same paper include Holden's crease and fold of the ...
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  • 5,872
1 vote

External hemorrhoids swollen but not thrombosed - why not drain on their own?

The fibrovascular cushions you describe are part of normal anal anatomy and are sometimes called haemorrhoid cushions. Haemorrhoid, as a noun, is usually used to refer to a pathological condition with ...
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1 vote

Studying Anatomy

This is normal, anatomy is a complex subject to grasp at first. I can suggest the following to help you study more efficiently: Learning Strategies Begin by knowing all systems of the human body (...
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  • 125
1 vote

What are the differences between internal organs between sub-saharan Africans and Northern Europeans?

why would natural selection stop at skin level? The division of humanity into "races" was not natural. Yes, some (e.g. darker skin in sunnier locations) was natural, but for the most part ...
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1 vote

Where do I find an interactive 3D model of the human anatomy?

I'll update this answer if I find new useful resources. I'm now trying this website: https://human.biodigital.com/view?id=production%2FmaleAdult%2Fmale_region_head_07&lang=fr and it helped me a ...
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