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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Migration

Politics

Romance

3 July 2025

5 min read

Families like mine are impossible now, thanks to the idol that is the net migration target

Politician priests are making pointless sacrifices on the altar of numbers

Joel Pierce

Joel Pierce is the administrator of Christ's College, University of Aberdeen. He has recently published his first book.

A Border Force officer wears body armour with Immigration Enforcement written on the back

UK Border Force.

Let me tell you a love story. Eighteen years ago, in a time before politicians had taken to immolating their values on the altar of the semiannual net migration totals, I fell for the pretty Scottish bridesmaid at my sister’s wedding. The romance presented some challenges for an American like me, but none that were insurmountable. She found a year-long internship near me in Seattle and, just before she returned home, I popped the question.

The process of applying for a UK visa was just another bit of the tedious logistics of an overseas move, the kind of thing a romantic comedy skips over with a ‘One Year Later’ movie subtitle so that it can end with a joyous wedding ceilidh in a picturesque Scottish locale. Our first few years together in Edinburgh were lean ones. Having takeaway coffee more than once a week felt like a scandalously indulgent luxury. Even so, I was able to progress seamlessly from my marriage visa to indefinite leave to remain, to citizenship.

None of this would be possible if we were young twentysomethings in love today. We would fail every test of what the Home Office now considers to be acceptable romance.

During our first year of marriage, the stipend my wife received while training for ministry would have been well short of the £18,600 income threshold introduced in 2012 for a sponsoring spouse, let alone the £29,000 required now. While we did have some savings, they were nowhere near the £88,500 now needed to waive the income requirement, and, in any case, would have been substantially drained by the £5,000 in fees and health surcharges that a two-and-half-year spouse visa now costs. It is little wonder Brits who have found love abroad, even ones in a substantially better financial and professional position than we were then, are now finding it impossible to move back to the UK.

What is the cause of these new barriers? A hint can be found in the title of a recent Guardian article about recommendations for a slight relaxation of the income threshold to between £23,000 to £25,000. ‘Lowering UK’s income requirement for family visas ‘would increase net migration’, the piece was headlined. When even the most left wing major daily in Britain can’t report on the possibility of things being marginally easier for Brits who have the temerity to love a non-citizen, without framing it in terms of net migration, it’s a sign that we have all fallen captive to this singular statistic.

Net migration is a number created by humans and yet it has come to play the role of an angry god which demands sacrifices every time it is reported. The right of working class people to marry a non-citizen spouse, the economic viability of our universities, and the proper staffing of the NHS are all victims its politician-priests have offered up in hopes that they would satiate its hunger. Net zero maybe next.

There is no particular reason to think totting up the total number of people who arrived in the UK with the intention of staying here for a year and then subtracting the total number who left with the intention of staying abroad for a similar duration is a particularly meaningful exercise. It conflates people like me, who came here with every intention to settle and start a family, with students coming for a one-year master’s, doctors filling vital roles in NHS with children try to stay with with a migrant parent and Afghan refugees seeking long-term sanctuary with oil workers serving time in Aberdeen before moving on to Calgary or Brunei.

The dominance of this statistic in our discourse has warped our moral discernments.

There are perfectly legitimate reasons to think carefully about how much of each form of migration to allow, but when they are all grouped together under this single measure a peculiar logic sets in. Want to do the right thing by welcoming refugees from Ukraine and Hong Kong? Well, then, we’ll have to offset that with restricting visas for overseas students and throwing our higher education sector into chaos. Need more highly skilled programmers working in banks in London? Well, maybe we can balance that by demanding care workers abandon their kids if they want to look after someone in Nottingham. There is no reason to weigh the needs of these different sectors against each other, and yet the logic of this statistic demands that we do.

The Bible has a word for human-made things which take on their own singular, violent logic. It calls them idols. While that word may conjure images of golden calves, the accusation which biblical writers consistently make against idolaters, that their idols blind them to what is really important and numbs their critical thinking, applies equally well when the idol is a statistic. The dominance of this statistic in our discourse has warped our moral discernments. It has made us unable to say what should be said without glancing nervously at its imposing shadow. It causes us to say things that should never be said and not notice how absurd they are.

Instead, we should be able to celebrate that hundreds of thousands of people want to come to study at our universities (the vast majority of whom return home after finishing their studies) and, hopefully, someday also be able to celebrate when hundreds of thousands of refugees are able to return to a peaceful and liberated Ukraine without having to calculate that the former will raise and the latter lower our totals. We should be able to welcome easing of income restrictions on spouse visas without noting that it will lead to a marginal increase in net migration. We should be able to see that sending an eight- and eleven-year-old back to Brazil without their parents is not, in the words of a Home Office official, “a degree of disruption in family life” which is “proportionate to the legitimate aim of maintaining effective immigration control”, but rather a gross violation of human decency.

Migrants are not just numbers on a balance sheet. The diversity of our lives, what we give to the UK, what we receive in return, cannot be summed up in a single annual figure. And yet every six months, as the figure comes out, politicians express disappointment and announce measures to put that little bit of extra pressure on us, so that maybe a few more of us who can leave will. In the process they are sacrificing to this idol not just the peace of mind and the economic well-being of many migrants, but also much of the vitality of the nation as a whole. The Bible has a solution for idols. They are only fit to be melted down, destroyed, and forgotten. It is time to consider giving this one a similar treatment.

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