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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.

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Music

28 August 2024

7 min read

10 things I learned from Reading Festival's teenagers

Some uplifting down time.

Krish Kandiah

Krish is a social entrepreneur partnering across civil society, faith communities, government and philanthropy. He founded The Sanctuary Foundation.

Festival goers, in a cafe tent, make drinks or sit around talking

Time out in the Street Pastors cafe.

Reading Street Pastors.

Last weekend I was at Reading Festival which has become a rite of passage for teenagers from across the UK. Over 105,000 young people turn up to the festival for a weekend of music and mayhem. The typical guest has just received their GCSE results, and heads for Reading, or its twin festival in Leeds, to reflect on what they are going to do next. Headliners this year included artists such as Lana Del Rey, Raye, Prodigy, Beadobee and Liam Gallagher.

My role at the Festival was as a volunteer with Reading Street Pastors who offer a 24-hour safe, warm and dry space. They provide a vital service for these young people, many of whom find their first festival experience very overwhelming. Volunteers serve a ‘Mountain’ of hot chocolate, loaded with cream and marshmallows, or ‘Liquid Death’ – a rebranded aluminium recyclable can of water - along with a friendly face or a listening ear.

I got to spend time over the weekend with hundreds of teenagers who were prepared to spend hours in the safe space because their tents had collapsed, or they had forgotten to bring anything warm to wear, or their phone batteries were dead or because their friends had ditched them. I found our open-ended conversations insightful, and offered me the opportunity to learn a lot about the upcoming generation. Here are some of my observations:

1. They're brilliant

Too often, young people are written off as being uncommunicative, narcissistic, or addicted to social media, but given the chance, they are excellent conversationalists. I thoroughly enjoyed their company; they asked great questions, shared big ideas and offered honest, if surprising, opinions. It was actually a pleasure to spend time with them and I totally recommend it – even, or especially, at 6am in the morning.

2. They appreciate their parents

Of course, most of them wouldn’t tell their parents this, but to me, a total stranger, it appeared that they recognized and appreciated the influence of their parents. This was evident not only in those young people who were missing home and home comforts, but even in their music tastes. The band The Prodigy, who performed on the first night, stem from my era of music, and encompass dance, house, and rave culture. I heard many young people claim they were listening to them, or Liam Gallagher from Oasis, because “my mum/dad love them”. Music is quite a connecting point between generations, it turns out.

3. There’s a diverse range of political engagement

There was a wide range of understanding and interest in politics among these young people. I spoke to many who didn't seem to care about politics, feeling that politicians don't care about them and questioning why they should bother if they can't make a difference. However, I also met many politically connected and aware individuals, some of whom were aspiring to study at universities like Durham, Oxford, or Cambridge. These engaged youths expressed frustration, feeling let down by the political system and believing that politicians don't have their best interests at heart. They were aware of issues like tax increases and broken promises by political parties and expressed a sense of distrust and disillusionment. This disengagement is a significant problem, as it leaves young people vulnerable to populism. Some mentioned that in school elections, more right-wing parties were gaining attention because they seemed to take young people seriously, which I found fascinating and concerning.

4. There’s a lack of hope

I noticed many of the young people I spoke to didn't have a lot of hope for the future. Their huge outlay of £350+ on the weekend appeared to be evidence: many of them expressed resignation that they would never be able to own a house, or were worried about the escalation of global events such as the conflict in the Middle East and Ukraine. While social media is often blamed for creating anxiety in this generation, it seems that global events and mainstream media also play significant roles in shaping their perceptions and values.

Mental health and especially male mental health seem to have turned a corner.

5. There are conflicting views on the environment

Despite numerous advertisements and incentives for people to clean up after themselves at the festival, it was clear that there were two sorts of campers. While some picked up their own litter – and that of those around them, others had no intention of even taking their tent home at the end. Every year after the Reading festival, the site looks like a disaster zone, as if a hurricane has blown through, the aerial shots released of the aftermath remind me of the movie Twisters. Another wave of volunteers comes in to help clear away the debris. However, I heard one young person say: "My mum and dad didn't raise me to live this way." Young people are not a monolithic group, and we shouldn't expect them to be. We can’t tar them all with the same brush. Some may not care about the mess they leave behind them, but others really do.

6. Queueing is dying

Maybe it has always been this way, and I am just getting too old for it but it seems nobody respects my tactic of getting to the front to see the big-name band by arriving at the venue early, waiting for the barrier gates to open and then picking your spot and waiting. At Reading Festival, I’ve learned that about 5 minutes before the band comes on, there’s a sudden surge of people who snake their way through the crowd claiming to be ‘just finding their friends’. I didn’t see any great reunifications. What I saw was disrespect of the good old British value of queuing. The problem is I’m too old to remember whether I did that as a teenager too.

7. Faith is not embarrassing

The safe space run by the Reading Street Pastors was busy. Maybe it was due to the torrential downpour that left many tents uninhabitable, but I remember it being the same last year. The young people seemed to appreciate not only the company, hot chocolate and warm blanket, but also the opportunity to chat. Volunteers offer their help to all without distinction, whatever faith background they are from. But faith often came up in conversation. I heard: “Why do you run this tent?” “Why are you volunteering here?” “Are you guys religious?” “What does it mean to be a Christian?” “What are the best bits of the Bible to read when you are feeling lonely?” “What does the Bible say about drugs?” “Can you help me with the religion and ethics questions for my A-level Philosophy coursework?” Overall, faith was discussed openly, as something interesting and positive.

8. Mental health issues are losing their stigma

At 6.30am a huge security guard walked into our safe space and during the long conversation that ensued, what struck me was his openness about his mental health and anxiety. There was no stigma, no shame, in talking to me, a stranger, about his struggles. He was not the only one to be open about his mental health issues and it felt like a very healthy development in our society. Mental health and especially male mental health seem to have turned a corner.

9. Teenagers need to learn survival skills

Shivering in our safe space at 6.05 in the morning was a lad who had come to the Reading Festival with only his t-shirt and jeans. He didn’t even think he might need a coat, let alone a waterproof tent. At the other end of the space was a lad with a full-on Calor-gas stove, whipping up some nourishing pasta-based meals for his friends. It was clear to see which of the two 16-year-olds had done the Duke of Edinburgh scheme. The expedition training and experience has given him survival skills for life.

10. Music is a grand uniter

In my day, music fans would be glued to their television screens on a Thursday night as we waited to hear who had the number one single of the week. That hour of the week was part of our shared cultural identity and everyone was talking about it at school the next day. Nowadays, Youtube, Spotify and the other infinite ways to access music has taken away the grand unifying cultural portal that was Top Of The Pops. Yet, somehow, they provide young people with diploma-level knowledge in popular music through the decades. They all know not only the breakthrough artists and latest hits, but lyrics to everything from Sabrina Carpenter and Lana Del Ray to Oasis. On a warm summer’s evening, with the sun setting there’s something very beautiful about a crowd of 70,000 people singing songs together.