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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Life & Death

7 August 2024

6 min read

Dying well: what is neglected needs to be put right

How each of us can prepare ourselves and those we leave behind.

Matthew Hutton

Matthew is the author of Your Last Gift – Getting Your Affairs in Order.

A group of grieving friends with their hands on each others backs.

The Good Funeral Guide on Unsplash.

In their November 2023 Theos report Love, Grief and Hope: Emotional responses to death and dying in the UK, Madeline Pennington and Nathan Mladin produce the surprising finding that, over the past year, one quarter of Brits had thought about their own death at least once a week. They go on to consider related emotional responses, chiefly fear. But, however often we think about death (maybe never), what do we do to prepare for the certainty of it, when we are used to making all sorts of preparations for practically everything else in our lives?

First, we can, without being morbid, live our lives in broad terms in the consciousness that we are mortal (and, if you will forgive me as a classicist for delving into Latin, living ‘sub specie aeternitatis’ which means ‘from the standpoint of eternity’). Second, there are things we can do in terms of getting our house in order, both for our own peace of mind and for the benefit of our loved ones and those we leave behind. This is both spiritually and materially, though I would want to argue as a Christian that the whole of life (whether in this world or in the next) combines both aspects.

Having had quite a feisty and competitive brother/sister relationship (with not a little ribbing from her about my own faith), we came to enjoy the warmest possible sibling love for and appreciation of each other.

My dear sister Debbie died aged just 49 in July 2005. She had telephoned me only eight months before to tell me of the grim diagnosis of stage 4 lung cancer, saying that there were two things she needed to sort out: her will and her relationship with God. I replied (as a Christian and as a private client lawyer) that we could sort both those out. I referred Debbie to a vicar I knew in a church round the corner from where she lived. She was a bit hesitant, saying that, having kept God at arm’s length for all her life, wasn’t it a bit presumptuous now to be knocking on the vicar’s door? I suggested that she should think of it from his point of view, in terms of job satisfaction: that after all was precisely what he was there to do, telling people about God and helping them to find a personal faith.

So that’s just what she did, coming to that faith herself following time with the vicar, with me and with other friends, in the February. And she died as a self-proclaimed Christian five months later. For me, the most precious thing apart from knowing that she would be with Jesus forever was this: having had quite a feisty and competitive brother/sister relationship (with not a little ribbing from her about my own faith), we came to enjoy the warmest possible sibling love for and appreciation of each other.

Second, my mother, whose ideas of Christianity were never terribly clear, though she was a very faithful listener of my sermons, came to faith (as I saw it) just 12 days before she died in May 2010. It was at a home communion given by one of the local clergy team that, as she received the bread and/or the wine (I forget which), a most powerful voice within my spirit told me that she had received Jesus. And that night, by way of confirmation, my wife Annie had a very clear dream of my mother (it had to be her, wearing her most distinctive pink kaftan) dancing at the foot of the Cross.

We lived just five minutes from Mum and, again, my early evening visits to see her, to chat, to read from the Bible and to pray were somehow transformed. While I am not sure that she had the same clear consciousness of having moved from darkness to light as had Debbie, I was quite clear that she had – and noted in my prayers at her funeral that at the end she had received Jesus.

Third is my very close friend Jim who died aged just 67 in November 2020: I had talked to him about the Christian faith on a number of occasions, but he simply didn’t want to know. Then just one month before he died, in a telephone conversation with him in hospital Jim asked me to explain it, from a position of dire physical need and wanting to hear. I didn’t know how ill he was and, having explained the essence of Christian belief in very simple terms, prayed with him over the telephone.

As it happens, Jim survived another month at home, during which time I was able to visit him four times and (now having been ordained) give him and his Christian wife Judi Home Communion, as well as pointing him to and talking about Mark’s Gospel and praying with him. His new faith led to a new intensity in our friendship. Jim was quite clear about his new relationship with Jesus, seeing himself as the lost sheep, on which I preached at his funeral, before (as a profoundly moving experience) conducting his burial.

None of us of course knows for sure what happens after death. But Christians are by God’s grace given this ‘sure and certain hope’ of an eternity to be spent with Christ in God’s new creation. And it’s the clear Christian message that that eternity starts now, when we come to faith. There’s a new relationship with God in Christ and, which is my experience, with our brothers and sisters in Christ, especially precious when those folk are close to us anyway.

And then of course, perhaps most importantly, what is broken needs to be put right.

That’s the spiritual aspect. What of the material – by which I mean all the practical ‘stuff’: those who are left behind having to sort out our possessions, Inheritance Tax where payable and a whole host of other things? It is a subject touched on in the Bible, perhaps surprisingly. Consider Paul writing to Timothy that a person should provide for their relatives and especially close family), which I take it would include post-death as well as lifetime provision. And then supremely of course Jesus in providing for his dear mother by entrusting her to his beloved disciple John.

In this context, I can do no more than make a few pointers, which with other suggestions I develop in my book.

There are what I call ‘The Three Essentials’: Lasting Powers of Attorney in case of mental incapacity (for both property & financial affairs and health & welfare), Wills (including the all-important choice of executors) and funeral arrangements. Just 44 per cent of UK adults have made a will.

Then there’s a host of other things, including appointing guardians for any minor children, providing for dependent relatives and making arrangements for pets. What about access to digital assets, for example? Let alone dealing with things about the home.

And then of course, perhaps most importantly, what is broken needs to be put right - relationships, where forgiveness could be sought or given. And, more widely, are there people you want to spend more time with, things you want to do or places to visit?

My suggestion is that dying well embraces first of all the peace which comes from the belief that Jesus has died the death my sins deserve and consequently a restored relationship with God our Heavenly Father; and second, making what practical arrangements we can in advance, to ease the stress of those we leave behind in sorting out our affairs.

Matthew Hutton is the author of Your Last Gift – Getting Your Affairs in Order.