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.

Column

Assisted dying

31 July 2024

4 min read

Polly's pop at a "pitiless God" distorts my argument

There’s more than one argument for opposing assisted dying.

George Pitcher

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

A hand rest gently on another outstretched hand.

Alexander Grey on Unsplash.

I hesitate to have a pop at the venerable Guardian columnist Polly Toynbee, partly because I like and admire her work. And partly, in this new media environment in which my enemy’s friend is my troll, I fear aligning myself with foam-flecked righties who use words like “Guardianista” and “wokerati”.

But she wrote a column late last week about assisted suicide that was just plain wrong. And, actually, I think she’s being profoundly illiberal on the subject, for reasons I’ll explain in a moment.

Assisted suicide – voluntary euthanasia, assisted dying, call it what you will – was a hobby horse of mine some 15 years ago when I wrote a book against it. Slightly more recently, Toynbee and I were on a broadcast interview together on an entirely unrelated subject when, to the bemusement of the presenter, she suddenly raised assisted dying to have a go at me. It was quite flattering.

Anyway, last week’s Toynbee column was of a kind, dismissing the anti-euthanasia case as the province of religious nutcases (presumably like me). Consider this massive straw man of a sentence: “Only God can decide how long we should suffer before death comes at a time of his pitiless whim, they say.”

I’m used to this, though not from Toynbee. Debating assisted suicide, it’s only a matter of minutes before someone will say that I shouldn’t impose my “sanctity of life” beliefs on other people. Eh? I’ve never used that phrase in this context (whatever it may mean). In fact, my views on assisted suicide are entirely secular, though informed by a faith that respects the primacy of compassion for and defence of the most vulnerable in our society.

I believe that a jurisdiction that enshrines in its legislature the principle that some lives are more worth living than others takes us into very dangerous moral territory. Related to that, a two-tier structure for the value of human life in the medical professions is abhorrent. That’s why I say that to despatch the weakest and most vulnerable among us is unacceptably illiberal.

The terminally ill, the disabled, the profoundly depressed and the aged and vulnerable really shouldn’t be treated as a nuisance to be helped on their way.

A bill will come back to parliament to change the law to allow assisted suicide this autumn. With new PM Keir Starmer in favour and a very different configuration of the House of Commons post-election, its chances of passing are said to be high.

But even Lord Falconer, the parliamentary poster-boy for assisted suicide, who convened a ludicrous “independent” commission in 2012 stuffed with euthanasia enthusiasts and useful idiots, has accepted that no so-called safeguards can entirely ensure that no lives will be lost to malfeasance or malpractice.

So, my question to Falconer and Toynbee is this: How many unnecessary lives lost to assisted suicide is enough to have what you want? 100? 50? One? Another number?

It’s commonplace for deeply distressing accounts of agonising deaths to be rehearsed in support of assisted suicide. Toynbee did so last week. But as Falconer must (or should) know, hard cases make bad law. The only focus here should be on how best to ensure that no one need die a bad death.

For Falconer and his supporters the solution is to legislate so that terminally ill patients can be helped to kill themselves. But speaking to end-of-life medical professionals, such as Baroness Finlay of Llandaff, many of whom claim that advances now mean that bad deaths are vanishingly few, it’s clear that the UK’s world-leading palliative care has in sight the day when no one need die a bad death.

That’s no comfort to someone who is suffering at the end of their life right now. But assisted suicide puts that palliative care target in jeopardy, when it makes death a form of medical treatment. Look at the record – the Netherlands now allows assisted suicide for those who are simply “tired of life”. That’s not where end-of-life care should go.

The burden of proof under the Suicide Act (1961) lies with the defendant, who currently faces a maximum jail sentence of 14 years for assisting or encouraging a suicide. Those who have demonstrated that they have acted with compassion and consent have in turn been treated with compassion and leniency in the application of the law. Invert that burden of proof, with the Crown needing to prove that an unscrupulous relative or friend coerced a victim into suicide, and we’re into a fresh hell of moral jeopardy.

The law works as it stands. The terminally ill, the disabled, the profoundly depressed and the aged and vulnerable really shouldn’t be treated as a nuisance to be helped on their way. Again, as we might expect Toynbee to know, that is wholly illiberal.

It looks like the assisted suicide lobby will get what they want this year. It will be hailed as a great liberal social reform. Doubtless they will find it in their hearts to forgive me if I continue to demur.