The heart of the matter

Heart doctor Michael Henein steps back to consider the unseen and unique wonders of the human body’s design.

Michael Henein

Professor Michael Henein is a consultant cardiologist, and a Professor of Cardiology at Umea University, Sweden.

A model of a human heart on a short stand.

Photo by Jesse Orrico on Unsplash.

Shakespeare famously asked:

“What a piece of work is a man, how noble in reason, how
infinite in faculties, in form and moving how express and admirable, in action how like an angel, in apprehension how like a god! the beauty of the world, the paragon of animals—and yet, to me, what is this quintessence of dust?

Humans may be complex, capable of great heroism and deep depravity, yet it is worth stopping for a moment to look at the human body and mind to marvel in what we have become, and how we are made.

The visible design of the human body points out common features shared along with other members of the animal kingdom. Examples of these features are: two eyes, two ears, two nostrils, one mouth and four limbs, attached to a body and head. Detailed study of different seen parts of the body may, however, show some differences. For example, the presence of fingers and nails, hair distribution as well as a developed tail. While most members of the animal kingdom have teeth and a tongue, those two could also vary in their number and size, respectively, according to different species. Genetic investigations have shown that we humans share 99 % of our genes with animals, suggesting that our “earthly” component shares a common origin. Indeed, the twenty first century scientific findings match what is written in the Genesis story of creation, a story written over 3,500 years ago, well before genetic sciences came to light.

Creatures great and small

As for morphological differences between animal species, it is difficult to naively conclude why some are wild while others are man-friendly-even if the wild ones have different shapes, design, dietary habits, body size and life span. Other important observed features of the members of the animal kingdom are that they are all born, they all age, then ultimately die.

If we are to look at the unseen features of the members of the animal kingdom, we can again identify similarities. For example, all have a gastrointestinal tract, a cardiovascular system, a reproductive system, a respiratory system, a urinary system and much more. While these systems may differ slightly between species, the overall structure and function achieve similar purposes. For example, heart speed is faster in small animals like rats compared to big ones like elephants who have very slow hearts. Likewise, the respiratory system and the number of respiratory cycles per minute are significantly faster in running animals compared to the sedentary and slowly moving ones. Finally, the number of offspring also differs in different species, being just one at a time in big animals like elephants and horses, and many offspring in small animals like rabbits and mice. Such paradox between the number of offspring and animal size makes you think of the important determining role of the activity of those animals.

Unseen wonders

Now to turn to the rest of the animal kingdom and the unseen features of the human body. To start, let us look at the amazing functions of the human brain and its various functions. When humanity is sometimes described as the crown of creation, such a description is based on the superiority of human brain function and skills. Its sophisticated structure and how vital centres are created deep in the skull, to be protected from traumas, make you marvel. Also, the brain controls the different functions of the whole body, with its sensory and motor activities, various vital system functions including the lungs and the heart, all endocrine glands’ function, in addition to various receptors and centres that allow utmost precision and accuracy in everything we do. An example of this kind of precision is a doctor feeling a vein or an artery with the tip of a finger to insert a needle or a musician moving a finger a few millimetres while playing a violin, to produce the exact sound needed. Furthermore, the integrated function of human muscles, nerves and spinal cord is also amazing, let alone the synapsis between the nerve endings and muscle bundles, the chemicals secreted in them which allow electric stimulus transmission from the nervous system to achieve the motor function and desired movement.

The human brain also has the unique feature of storing knowledge. Of course, we should not ignore the importance of the training and programming ability of human brain. We learn how to drive a car, how to play games, how to study, how to operate safely on a sick patient. Such acquired skills are quite limited in other members of the animal kingdom. Moreover, the human brain has the unique ability to invent, discover, improve and correct errors it identifies.

Another very unique feature of human brain is its ability to conduct speech, a feature of humans that is under-developed in other members of the animal kingdom. While most animals can make noise and sounds, only humans can articulate words, sentences and even sing very complex songs. This unique ability seems to be the underlying mechanism behind the development of languages which are based on the human ability to talk and transmit information and knowledge by words and phrases.

The unseen brain has allowed human life to develop over time, building skills and achievements from generation to generation. Millennia ago, humans lived in huts together with animals, and now they build houses and palaces to live in. Centuries ago, we used donkeys, horses and camels to travel but now we use cars, trains, ships and airplanes. Our ancestors burned wood and coal to cook and to warm but now we use electricity to do these.

When we look carefully at the unseen parts of the human body, we also realize that we cannot alter any of it, despite the scientific advances made over the years. We can understand what harms our body and take measures to avoid it. Out of the ability of our brain to discover and invent, we have now produced science-based means for curing various diseases. Consider how we can replace a dysfunctional heart valve or a mobility-limiting joint. These inventions have resulted in a better quality of life, alleviating of symptoms, even helping to avoid early death, in some cases such as heart disease and cancer.

The heart of the matter

Another unseen source of life in humans is the heart. This fist-size organ is so complex in its structure and function. Recent scientific advances have enabled us to study heart function in milliseconds, hence the development of pacemaker treatments. They have also allowed clear imaging of the inside of the heart and the identification of pathologies, developments that guide practitioners to the optimum treatment of heart conditions. Recent discoveries have also allowed us to better understand how people develop coronary artery disease and how the pathology starts at the innermost layer of the arteries, particularly in individuals carrying significant risks for atherosclerosis including, smoking, high blood pressure, diabetes, high cholesterol and obesity. Amazingly, obesity has been shown to be the strongest underlying cause of other risk factors, hypertension, diabetes and hypercholesterolemia. So, nature cannot be blamed in many of these patients but our own patterns of behaviour. Science has shown that walking at least 5,000 steps each day, complying with the design of our body, reduces the likelihood of developing coronary artery disease by 15 per cent.

The unseen physiology of the rest of our body systems and the interaction between systems make us wonder how we are made. A rise of our body temperature by one degree due to a bug infection affects all body systems from the brain to the heart. A virus which cannot be seen by the most powerful microscope can destroy our lungs and cause premature death, as was the case with COVID-19 and others.

Finally, human inventions in the form of powerful microscopes have allowed scientists to study the human cell, which is the smallest living component of our body. Such small cells cannot be replicated in any factory in the twenty-first century, despite the vast scientific developments that surround us. You'll be surprised to learn how complicated and meticulously fine-tuned a human cell is and also how it functions, connects with other cells and other parts of the body. An example of this is the interaction between body minerals, calcium, sodium and potassium with heart and muscle individual cells. Such a function is critically controlled by many factors such as time, electric stimulation and pressure differences producing remarkably harmonious contractions and relaxation of the muscles without missing a beat.

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15 August 2024

4 min read

Faith is no longer a dirty word in publishing

Sarah Perry’s comments suggest a reawakening of concern for its observation.

George Pitcher

George is a visiting fellow at the London School of Economics and an Anglican priest.

A woman being interviewed gestures with a hand in front of her

Sarah Perry.

Waterstones.

If there’s one thing anyone who has ever written a novel can’t stand, it’s having to congratulate a successful novelist. So, it’s through gritted teeth that I warmly welcome the words of Sarah Perry (The Essex Serpent) that religious faith is ceasing to be a subject of embarrassment in published fiction.

It’s about time. Perry told the Edinburgh International Book Festival that, for her latest book Enlightenment, she was asked to put in more theology: “I assumed that everybody knew what the doctrine of predestination meant.” Bless.

The cause of my pathetic envy as I applaud her is that I had my first (and, to date, only) novel published in 2017, to almost universal disinterest. I like to tell people that it was well received – all three people who actually read it said they enjoyed it and only one of them was a family member. It actually did a bit better than that, but you get my drift.

It was an unashamedly religious psychological thriller, titled A Dark Nativity. Brace position, here comes a one-sentence synopsis: The narrator, Reverend Natalie Cross, is a frustrated former aid worker who undertakes a mission to Israel, is kidnapped and held hostage, murders her way to freedom, discovers she was the victim of an Anglo-American plot, wreaks her terrible revenge and (spoiler alert!) gives birth to a son of uncertain paternity.

See what I did there? As well as the latter-day Nativity resonance, thematically I was interested in what redemption looks like in Israel and Palestine. I know, I know – but even I thought it would be distasteful to try to cash in on what’s happened there since.

Enough of the plug for a seven-year-old novel. My point is that its religious themes actively militated against it at the time. Novels addressing Christian faith (or any other kind) occupied a particular publishing niche – a harsher word might be ghetto. To try to break out of it was pointless. The great Christian novelist Penelope Wilcock told me (very kindly) that my book was too religious for the secular market and too secular for religious readers.

Perry’s observation that faith is no longer a dirty word in publishing might yet suggest a reawakening of serious concern for its observation.

The restricted area to which religion was confined had its stylistic rules. There was the cathedral close romp, which authors such as Catherine Fox had made their own. The vicarly whodunnit (lately updated by Reverend Richard Coles). Magic realism with its daemons and Philip Pullmans. And anything, in the wake of Dan Brown’s The Da Vinci Code, involving ancient plots that might make a movie, with hooded figures walking in slo-mo through cloisters.

Vicars had to be evil or silly. I may be both those things at times, but I’d like to think there is other stuff going on here for cultural exploration. My narrator, Nat Cross, was driven, often funny and more than a little mad. So like a lot of Anglican clergy.

If she’s right – and I very much hope she is – it’s why what Perry has to say is so hopeful. Because it begins to suggest that religious faith is slowly beginning to be accepted back into polite society. Whisper it softly, it might even become a cultural norm. If Richard Dawkins can describe himself as a “cultural Christian” and the historian Tom Holland, in his book Dominion, can claim that Christianity is the entire foundation of western civilisation, then there is everything to play for. And, indeed, write for.

It’s not as if cathedral frolics and the revelation of Jesus’s wife in Leonardo’s Last Supper was anything other than a fictional diversion of post-modernism. Religion and specifically Christianity had been a staple of the novel in English.

I hesitate to mention their names in the same column as the authors above (including me, most obviously), but Graham Greene’s exposition of Catholic guilt in The End of the Affair and Evelyn Waugh’s of the impossibility of moral reformation in Brideshead Revisited are probably the best religious novels of the twentieth century.

Further back towards the birth of the English novel, the Reverend Edward Casaubon in George Eliot’s Middlemarch is perhaps the most tragic portrait of a clergyman who is neither evil nor silly. He stand as a warning from history to today’s Church of England.

And it’s to that, the established Church, that Perry’s remarks ultimately turn our attention. We’re told that there has been a five per cent spike in church attendance recently, but that of itself isn’t sufficient to suggest a renaissance in our religious culture. Our arts and culture will only ever really reflect what we care about.

Perry’s observation that faith is no longer a dirty word in publishing might yet suggest a reawakening of serious concern for its observation. If so, that’s good news for the religious, as well as for religious authors. And I might just get a sequel out of it.