25 Biological Differences Between Men And Women That Aren’t Commonly Known

Posted by , Updated on August 29, 2016

We all know that men and women are different from each other. That much is solidly within the world of fact. And many of those differences stem from our biology (there are a good amount that could be chalked up to our environment, but that isn’t the subject of this article). We all know this, but what exactly are those biological differences, apart from the obvious ones? Well, fortunately for us, doctors and scientists study things such as these. In healthcare, it is critically important to distinguish between men and women because they need different types of attention. From drug doses to emotional support, there are varying needs in every department which is why doctors and scientists study this so thoroughly. They have to make sure that both men and women receive the best level of care.

For our purposes today, however, we’re more concerned with finding out what exactly those biological differences are. At least the less-known ones. These are the differences that you were never aware of. They’re not obvious, but they exist. And they define at least a little bit of the difference between male and female. So, without further ado, these are 25 Biological Differences Between Men And Women That Aren’t Commonly Known!

Subscribe to List25

Featured Image: Shutterstock

25

Most babies born with birth defects are male. If a female has a defect, she still has another copy of that X chromosome.

Most babies born with birth defects are male. If a female has a defect, she still has another copy of that X chromosome.Image: pixabay, Source: wikipedia
24

Veins in males tend to be larger

Veins in males tend to be largerImage: Colin Davis via Flickr, Source: wikipedia
23

Males are 4 times more likely to be autistic than females.

Males are 4 times more likely to be autistic than females.Image: picserver.org, Source: wikipedia
22

Females tend to have more vertical foreheads, while males' foreheads tend to be sloped.

Females tend to have more vertical foreheads, while males' foreheads tend to be sloped.Image: wikipedia, Source: wikipedia
21

In males, fat gets deposited between organs. In females, it forms a ring around the abdomen. This is why you can typically tell someone's sex from an MRI, and why liposuction is easier in females.

In males, fat gets deposited between organs. In females, it forms a ring around the abdomen. This is why you can typically tell someone's sex from an MRI. And why liposuction is easier in females.Image: public-domain-image.com, Source: wikipedia

20

Perhaps unexpectedly, males have longer eyelashes on average.

Perhaps unexpectedly, males have longer eyelashes on average.Image: wikipedia, Source: wikipedia
19

The first finger of a female's hand is usually longer than the third. With males, it's usually the other way.

The first finger of a females hand is usually longer than the third. With males, it's usually the other way.Image: pixabay, Source: wikipedia
18

Only females can pass mitochondrial diseases on to their offspring.

Only females can pass mitochondrial diseases on to their offspring.Image: wikipedia, Source: wikipedia
17

Males are 3 to 10 times more likely to stutter.

Males are 3 to 10 times more likely to stutter.Image: pixabay, Source: wikipedia
16

Although both sexes lose hearing on either end of the spectrum, males tend to lose more hearing of high pitched sounds, while females tend to lose more hearing of low pitched sounds. People have noted that as time goes on, males and females literally lose the ability to hear each other (it's a joke).

Although both sexes lose hearing on either end of the spectrum, males tend to lose more hearing of high pitched sounds while females tend to lose more hearing of low pitched sounds. People have noted that as time goes on, males and females literally lose the ability to hear each other (it's a joke)Image: youtube, Source: wikipedia

 

 

15

Females are significantly better at distinguishing between shades of various colors than males.

Females are significantly better at distinguishing between shades of various colors than malesImage: wikipedia, Source: wikipedia
14

Blood flow is more evenly distributed in the male body. In females it is concentrated around core organs and the pelvic region. 

Blood flow is more evenly distributed in the male body. In females it is concentrated around core organs and the pelvic region. Image: pixabay, Source: wikipedia

Fun fact: this is why females’ appendages get colder more easily.

13

There are about 1,000 genes that vary between males and females with regards to the liver. This is why the sexes process everything from alcohol to Tylenol at different rates.

There are about 1,000 genes that vary between males and females with regards to the liver. This is why the sexes process everything from alcohol to tylenol at different rates.Image: wikipedia, Source: wikipedia
12

Females tend to have a broader face than males

Females tend to have a broader face than malesImage: pixabay, Source: wikipedia
11

The external occipital protuberance (the bump on the back of your skull) is bigger in males than in females.

The external occipital protuberance (the bump on the back of your skull) is bigger in males than in femalesImage: wikipedia, Source: wikipedia
10

The male jaw bone is heavier than the female jaw bone.

The male jaw bone is heavier than the female jaw boneImage: wikipedia, Source: wikipedia
9

Some studies have found men to have more standard deviation in IQ. This has been spun by the media to partially account for why both more mentally handicapped individuals as well as geniuses tend to be male. (note: the media tends to draw more conclusions from inconclusive studies than scientists do.)

Some studies have found men to have more standard deviation in IQ. This has been spun by the media to partially account for why both more mentally handicapped individuals as well as geniuses tend to be male (note: the media tends to draw more conclusions from inconclusive studies than scientists do)Source: http://personal.lse.ac.uk/kanazawa/pdfs/PAID2011.pdf, Image: wikipedia
8

Women tend to gather a greater proportion of their energy from aerobic respiration; men tend to spend more time in anaerobic respiration, relatively speaking.

Women tend to gather a greater proportion of their energy from aerobic respiration (men tend to spend more time in anaerobic respiration, relatively speaking)Source: https://www.researchgate.net/publication/14741124_Gender_difference_in_anaerobic_capacity_Role_of_aerobic_contribution, Image: wikipedia
7

The top edge of the eye socket is much sharper in females than in males.

The top edge of the eye socket is much sharper in females than in males.Image: wikipedia, Source: wikipedia
6

Females have better peripheral vision than males, while males are typically better at scanning. This is thought to have evolutionary origins (hunters vs gatherers).

Females have better peripheral vision than males, while males are typically better at scanning. This is thought to have evolutionary origins (hunters vs gatherers)Image: youtube, Source: wikipedia
5

During heart attacks, males experience the "classic" symptoms like chest and jaw pain, while for females the symptoms can be quite diverse. In fact, it can often be confused for heart burn.

During heart attacks, males experience the "classic" symptoms like chest and jaw pain while for females the symptoms can be quite diverse. In fact, it can often be confused for heart burn.Image: wikipedia, Source: webmd
4

Females' blood contains more water and about 20% less red cells.

Females' blood contains more water and about 20% less red cells.Image: pixabay, Source: wikipedia
3

Although female brains are better at many other tasks, male brains are geared towards giving them better spacial cognition.

Males have better spacial cognition than femalesSource: http://www.sciencedirect.com/science/article/pii/S0166432815302680, Image: wikipedia
2

Females tend to get motion sickness more easily, especially if they are pregnant.

Females tend to get motion sickness more easily, especially if they are pregnantImage: pixabay, Source: wikipedia
1

Males die more from almost every disease except breast cancer, female reproduction disorders, and benign tumors.

Males die more from almost every disease except breast cancer, female reproduction disorders, and benign tumorsImage: pixabay, Source: wikipedia

SEE ALSO: 25 Harry Potter Facts That Will Knock You Off Your Broomstick »

NOW WATCH: 25 Amazing Prehistoric Predators

Subscribe to List25
Show Us Your Love
Join Over 2 Million+ List25 Fans