Article

Awe and wonder

Comment

7 September 2023

6 min read

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.

Article

Comment

Romance

14 February 2025

5 min read

Getting hitched should benefit more than the advantaged

Marriage’s decline impacts outcomes for all.

Daniel Lilley and Simon Cansdale

Daniel is a researcher at Civitas and Simon is a vicar in Winchester.

A bride dressed colourfully stands next to her groom, dressed similarly, as he sits in a wheelchair.

Ellie Cooper on Unsplash.

Of all the dramatic changes to Britain in the last half century, one of the least discussed is the extraordinary decline in marriage.

The marriage rate has fallen by two-thirds in the last 50 years. It was just above six per cent in 1972 and has now been under two per cent since 2017.

This remarkable decline has corresponded with a rise in a relatively new relation type: cohabitation. Cohabitation was extremely uncommon before the 1960s, and even by 1986 just 10 per cent of new mothers were cohabitants. It is, however, rapidly becoming the mainstream. Now 35 per cent of babies are born to cohabiting mothers, and the total number of UK cohabiting couples increased from 1.5 to 3.7 million between 1996 and 2022.

Much of this is due to couples delaying marriage: 84 per cent of religious and 91 per cent of civil marriages are now between couples that already live together, and the average age when first marrying has climbed by 10 years since the early 1970s. But it is also due to many more couples not marrying at all.

Opinions understandably differ on this social transition away from marriage and towards cohabitation. It is a point of progress worth celebrating that the previous societal shunning of those, especially women, who had children outside of marriage has been left in the past. However, such progress has not been without consequences. Cohabitations are less stable, on average, than marriages. Cohabiting parents are around three times as likely to separate in the first five years of their children’s life as married couples.

This stability is not simply because wealthier, more highly educated people tend to have stable families and also tend to marry. Studies by World Family Maps and the Marriage Foundation have shown marriage to be a larger factor in family stability than either education or income.

Nor does the stability come from couples staying together miserably. Studies undertaken in 2017 and 2024 looked at the outcomes of couples 10 years on from considering their relationships to be ‘on the brink’. In the initial study, while 70 per cent of cohabiting couples had separated in the decade since considering themselves ‘on the brink’, 70 per cent of the married couples had remained together. Perhaps even more crucially, just seven per cent of those married couples that had stayed together were unhappy in their relationship a decade on. The 2024 study found none of the sample of married couples that had stayed together were still unhappy 10 years on. For those that had stayed together, things had improved.

This family instability that the decline of marriage has caused is also unevenly distributed. Affluent couples – often those most likely to criticise the concept of marriage – are much more likely to marry than disadvantaged ones.

Looking at socioeconomic groups, seven in ten mothers from the most advantaged group are married, while just a third of those from the two most disadvantaged groups are. The effect is geographic, too. Institute for Fiscal Studies research has found parents having children are more likely to be married if they are living in better educated areas. For the advantaged, it is compassionately affirmational to suggest that every relationship is equal, even though the advantaged themselves choose the most secure option of marriage: a hypocrisy only tolerated due to the potent fear of seeming judgemental.

The consequence of this is deepening inequality: disadvantaged families are rendered more likely to breakdown, while children from affluent backgrounds are disproportionately likely to enjoy the ‘the two-parent privilege’, the substantial emotional and developmental advantages of growing up in a stable home. Melissa Kearney coined the phrase, and her evidence shows how children grow up, on average, to have better educational outcomes, better emotional and physical wellbeing, and higher incomes if they are raised in two-parent homes.

Stable families are foundational to a stable society, and marriage is crucial to stable families.

So, why are marriage rates so much higher among wealthier couples than poorer ones, and why is this gap growing?

We can isolate three reasons in particular, each more solvable than the last.

Most challenging is the feedback loop effect: people whose parents, role-models, and friends have not married are unlikely to do so themselves. The demographic trend compounds itself.

Second, and easily addressable if only the will was there, is the public messaging effect: politicians – and to some extent celebrities – have consistently told the public that marriage is unimportant. In 2017, Marriage Foundation research found that it had been a decade since a cabinet member had discussed marriage in a speech. This has hardly changed in the years since. In 2024, the only major party whose manifesto even mentioned marriage was Reform; even then the focus in the relevant section seemed to be less on marriage and more on getting ‘people trapped on benefits back into the workplace’.

Third is the cost of weddings. A quick flick through top wedding magazines suggests that the average wedding costs upwards of £20,000. Survey evidence from both Marriage Foundation and the Thriving Center of Psychology have found that most young people view weddings as unrealistically expensive.

This financial problem is solvable: much of the costs relate to venue hire. Unless they are having a religious marriage, a couple will need to find a venue that has gone through the bureaucratic process of becoming an ‘approved premises’. The cheapest of these are register offices which, including all expenses, still cost about £500.

This is eminently mendable. The Law Commission proposal to reorganise wedding law around the officiant, not the venue, opens the door for a future of more affordable weddings by removing the regulatory barrier. It will also bring the law in line with that of other home nations.

This proposal will not work by itself, though, it will need to be supported by creativity in wedding planning.

Wedding costs can be substantially reduced by taking a DIY approach. Food, drinks, and decorations can often be coordinated amongst enthusiastic (and appropriately competent!) guests.

Booze free weddings are a growing phenomenon, and especially good for weddings with children.

Such ‘group-effort’ approaches often have a unique feel thanks to the high participation of guests, and people are more likely to remember events that they feel a sense of ownership of, having helped make them happen.

Alongside this is a recommendation by the Centre for Social Justice. It proposes subsidising the necessary statutory fees for the poorest couples, up to £550 per couple. An inexpensive and hugely beneficial adjustment to improve wedding accessibility for the least fortunate.

Stable families are foundational to a stable society, and marriage is crucial to stable families; perhaps it is time for all of us to make tying the knot easier.

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