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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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4 min read

What really happens when the Grand National comes to town?

Enjoy those great experiences but remember the neighbours.

Stuart is communications director for the Diocese of Liverpool.

Smartly dressed people crowd a station platform and stairs.
Racegoers arrive at Aintree station.
Merseyrail.

I love watching the periphery of events. Frequently I will be at a gig and find my eye and mind drifting to what is going on at the fringes of the stage. Security distributing water to the thirsty souls of the mosh pit whilst removing the crowd surfer of crushed individual (who invariably rushes back through the stadium to dive back into the fun). You have the semi interested standing at the back trying not to let a good gig interrupt their conversation. You see the road crew retrieving dropped mics, endlessly swapping guitars and nervously following the antics of the lead performers. It is all part of a community drawn together for a couple of hours, from the passionate obsessive to the mildly involved all being sucked into the occasion. 

And for over 30 years I have watched the very fringe of the world famous Grand National event. My wife has taught at a school about half a mile from the famous racecourse so twice daily we pass it by to and from her workplace. I have been to corporate events, our diocese has even held some there, in the stands so have overlooked the course but I have never nor will I ever attend the race meeting. 

But I am fascinated to look in and see the build-up. 

It starts around February as you start to see the white hospitality marquees being erected. You get the big advertising wraps proudly displaying the meeting’s sponsor. Then this week the TV outside broadcast vans turn up, signs directing people to the correct car parks and drop off points appear and the sense of the scale of operations looms large. 

Then there are the signs that someone like me trying to go about the ordinary business of the week don’t want to see. Road closures, no parking zones, diversions all being signposted telling me that this week will be challenging. Gone are the days then I was able to easily move house on Grand National day snaking past the ground while the horses hurtled round the course. 

Travelling in early on race day mornings you see the workforce that comes in to support the enjoyment of the many on race day. A small army of mostly young people dressed in the white and black of waiting staff decamp from the early Merseyrail trains heading to set up in readiness for the day’s punters.  

That’s the bit I mostly miss but it is when the community kicks in. Hordes of people in cars, coaches and trains descend on the area and while most are fine I know from friends living in the area that problems of low level anti-social behaviour affect many local residents when high jinks and too much alcohol spill over to a lack of self-control. And potentially a lack of respect with the notion that my enjoyment trumps anyone else’s rights. 

To be fair I see this type of things coming out of a gig. The moment the house lights go on the crowd that had not minutes before been singing as one voice to the bands biggest hit become engaged in the understandable desire to get home, to get the car out of the car park. As we boisterously leave the venue hyped up by the adrenalin rush you get from a good gig the signs plea to respect the venue’s neighbours is readily dismissed or overlooked. Of course, that sign doesn’t apply to me. 

Behaviour specialists will have no doubt studied the way this works in more detail and there is some research on how crowds behave which I believe informs safety management. This has got to be a benefit for all. And this may have been how things always were but around these events more and more local communities suffer from the impact of thousands suddenly descending and rapidly disappearing. It is similar to the impetus that has led to a backlash against tourists in cities such as Venice and Barcelona. Yes, these events do bring money into the economy, Taylor Swift’s Anfield concerts brought a great amount of revenue for Liverpool. However, a question would have to be how much that benefits the communities that take the brunt. 

The Grand National is big but not unique. And I hope the hundreds of thousands who visit have a tremendous experience but as they do I also hope that they respect the community that they become and the community they land in. 

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