The all-important heart is constantly at work, pumping blood (about 2,000 gallons a day) filled with essential oxygen and nutrients to your body’s organs 24/7. Everything about the heart and how it works is interesting but, here are some tibits of information we found particularly interesting.

The Heart Sits in the Center of the Chest, Not On the Left Side

Does this blow your mind because you’ve always been told it’s on the left? When we place our hands over our hearts for the pledge allegiance, we actually go a tad too far to the left. The heart is actually in the middle of the chest, snuggled between the lungs.

A small percentage of people are born with dextrocardia, a condition in which the heart points more toward the right side of the chest than the left. According to the National Organization for Rare Disorders, people who have dextrocardia with situs inversus (when visceral organs like the liver and spleen are reversed too) can live normal lives without any disability.

In many cases, though, dextrocardia is associated with other heart defects or other misplaced, and even missing, organs that might require surgery to correct.

The Human Heart Beats Around 70 Times per Minute

This is a ballpark figure, according to Mayo Clinic. A healthy adult heart should beat anywhere from 60 to 100 times a minute while at rest. Do the math, and it adds up to around 100,000 beats a day and 2.5 billion beats in the average lifetime. That’s a lot of hearth throbes...;o)

Newborns have the fastest heartbeats, at 70 to 190 beats per minute, and the hearts of well-trained athletes tend to beat slower, at a rate of 40 to 60 beats per minute.

Faster-than-normal resting heart rate (called tachycardia) or a below-normal heart rate (bradycardia) could be signs of heart problems.

It’s important to watch your normal heart rate over time, too. A recent study published in the Journal of the American Medical Association found people whose resting heart rates increased from under 70 beats per minute to more than 85 beats per minute over 10 years had a 90 percent increased risk of dying from heart disease compared to those whose heart rates stayed around 70 beats per minute.

Having a Cold Heart Isn't Always a Bad Thing

Therapeutic hypothermia is actually a form of treatment for cardiac arrest. According to American Heart Association guidelines for inducing hypothermia, doctors cool a patient’s body to 91 degrees F, 7 degrees below average, in order to slow damage to brain and other organs that begin when the heart stops and restarts.

Research published in the Annals of Neurology in late 2010 found that two-thirds of patients who received the therapy after revival from cardiac arrest recovered and went home with good heart function.

And a Big Heart Isn't Necessarily a Good Thing

In the literal sense, an enlarged heart is a symptom of heart disease. For an adult, a normal heart is about the size of your fist.

An enlarged heart, termed cardiomegaly, can occur for a number of reasons, some temporary (stress on the body or pregnancy) and some tied to heart condition (weak heart muscle, coronary artery disease, heart valve problems or abnormal heart rhythms).

Complications of cardiomegaly include cardiac arrest and sudden death (commonly seen in athletes), heart failure, heart murmurs, and blood clots, depending on the part of the heart enlarged.

Related Story: Male Thoughts on Valentine's Day

Monday is the Most Common Day of the Week for Heart Attacks

Mondays get a bad rap already, Manic Mondays, Monday blues or  case of the Mondays but, where heart health is concerned, it may be deserved. Research has shown that more heart attacks occur on Mondays than any other day of the week. One 2005 study published in the European Journal of Epidemiology found that the incidence of heart attack was 20 percent higher in men and 15 percent higher in women on Mondays.

Some experts theorize that the spike has to do with the stress of returning to work after a relaxing weekend, while others correlate Monday heart attacks with the effects of boozy Saturday nights.

Other popular heart attack days: Christmas, the day after Christmas, and New Year’s.

Male-Pattern Baldness is a Sign of Heart Disease

What!?!? (Lil John Voice)

This one may seem strange but, studies have shown that, compared to men with full heads of hair, men with crown hair loss have an increased risk of heart disease of about 23 percent. Men with complete hair loss on top of the head brings that number up to 36 percent. If you’re a guy who also has high blood pressure or high cholesterol, your risk is even higher.

Scientists can’t be sure what causes the link, but it might have something to do with testosterone. Too much of it interferes with hair growth on the head and also causes hardened arteries. The hair-loss link to heart disease could also be genetic.

The Body's System of Blood Vessels is More Than 60,000 Miles Long

There are three different kinds of blood vessels: Arteries that carry blood from heart to organs, Veins carry blood from organs and limbs back to the heart, and Capillaries which connect the two. Together, the arteries, veins and capillaries in the human body are long enough to go around the world more than twice.

Women's Hearts Beat Faster Than Men's

A female human heart pumps about six beats faster per minute than a male heart, which can be explained by the gender difference in heart size. A male heart is about 25 percent bigger, so it can pump more blood in a single beat.

But, having a quicker heart beat doesn’t equal quicker finishing times for runners. Because men’s hearts can pump more blood, on average, they tend to run faster than women.

Your Heart Doesn't Stop When You Sneeze

The increased pressure in your chest can affect blood flow to the heart, briefly changing its rhythm. But, contrary to common belief, your heart doesn’t skip a beat when you sneeze. That doesn’t mean you should stop saying “bless you” or “gesundheit” after a sneeze, though. It’s only polite!

Despite the name, your heart doesn’t stop during heart failure either. It just can’t pump blood as well as it should. The only time the heart stops is during cardiac arrest.