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Awe and wonder
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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.

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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3 min read

In the city of broken windows

Our fractures become fractal, breaking bigger and bigger windows.

Jamie is Associate Minister at Holy Trinity Clapham, London.

a multi-paned window mural shows people while amid it are broken window panes.
A broken window mural, Ellis Island Immigrant Hospital.
Rhododendrites, CC BY-SA 4.0, Wikimedia Commons.

We weren't expecting a knock on the door from our next-door neighbour on New Year's Day. It was pouring with rain, and said rain was pouring into the boot of our car, with the window smashed. Thanks for letting us know. Annoying, inconvenient and expensive. But just how expensive is a smashed window? 

The 'broken windows theory', that visible signs of crime, antisocial behaviour and civil disorder begets more serious crimes, was introduced American sociologists James Q. Wilson and George Kelling: 

'Social psychologists and police officers tend to agree that if a window in a building is broken and is left unrepaired, all the rest of the windows will soon be broken. This is as true in nice neighborhoods as in rundown ones. Window-breaking does not necessarily occur on a large scale because some areas are inhabited by determined window-breakers whereas others are populated by window-lovers; rather, one un-repaired broken window is a signal that no one cares, and so breaking more windows costs nothing. (It has always been fun.)' 

This is not an academic theory. Where I live in London, i took the local council 1,315 days to replace a local resident's broken window. The sense of decay extends beyond borders, with fewer than half the residents thinking they live on clean streets, with rubbish and weeds gone unchecked. It is also one of the worst boroughs in London for varying types of crime, and over the past few years often being the worst. It's hard not to think the little things and the big things are linked. In other news, the now-resigned CEO of the council has pleaded guilty to drink-driving, failing to stop after a car crash and driving without insurance, and not guilty to possession of cocaine. 

Our problems in society all found their greenhouses somewhere inside of us.

Crime is on the move. As homes have become more difficult to burgle, crime has been pushed out onto the streets with shoplifting and bike theft. The Economist recently reported that 'stolen bikes and e-bikes have also become the getaway vehicle of choice for thieves, according to the Merseyside police. In one way or another, some 80 per cent of acquisitive crime in Liverpool involves a nicked bike.' It's going to be fascinating to see the wider impact, but simply by stopping suspicious riders and marking thousands of bikes across Liverpool, reported thefts have fallen by 46 per cent between July 2023 and July 2024 compared with the previous year. 

These problems can't be solved by overstretched police or the council. Everyone's responsible so no one's to blame. Practical implementations of the broken windows theory have not been without controversy. But for those of us who live in urban environments, to look out from our homes is to see a city of broken windows. The impact is more than weeds 'uprooting' pavements: it's an uprooted society. Correlation and causation might be blurred, but that's the point. In Christianity, sin is understood as having a polluting effect. Just as fossil fuels in China will pollute the atmosphere for someone in Scotland, sin is not hermetically sealed. Our problems in society all found their greenhouses somewhere inside of us. 

Jesus said 'what comes out of you is what makes you 'unclean'. For from within, out of your hearts, come evil thoughts, sexual immorality, theft, murder, adultery, greed, malice, deceit, lewdness, envy, slander, arrogance and folly. All these evils come from inside and they make you 'unclean'.' They pollute our lives. And they pollute the world around us. 

The Christian church, much like many institutions, is reckoning with prioritising competency at the expense of character. Little sins are not so little when they permeate and promote a culture where certain sins are permissible. Our fractures become fractal, breaking bigger and bigger windows. 

All this sounds pretty bleak and Dickensian when of course there's always another city to see: full of life, vibrancy and joy. But we'd be wilfully ignorant to ignore the disorder of broken windows and broken lives all around us. It might overwhelm us, or our eyes might glaze over as we see those broken windows. But we'd do well not to ignore the broken windows within us too. For our sake, and the sake of our streets.