Anatomy
Fact-checked

At TheHealthBoard, we're committed to delivering accurate, trustworthy information. Our expert-authored content is rigorously fact-checked and sourced from credible authorities. Discover how we uphold the highest standards in providing you with reliable knowledge.

Learn more...

What is Human Physiology?

Tricia Christensen
Tricia Christensen
Tricia Christensen
Tricia Christensen

Human physiology is a life science and a branch of animal physiology. It is specifically the study of how systems of the body function in a well state, and this analysis of function is often at the cellular level, not of single cells but of how cells work in concert to achieve a normal state of function. Basic human physiology studies the body’s systems that function appropriately and as expected, while other disciplines like pathophysiology may look at the way body systems develop disease in attempts to find insight into how to cure diseases.

There may be several main concerns in human physiology from a scientific standpoint. These concerns include the way interdependence between body systems occurs (such as the central nervous system and the musculoskeletal system). This is called integration.

Hippocrates is sometimes considered a physiologist.
Hippocrates is sometimes considered a physiologist.

Another point of interest is communication, which is how the body’s systems send signals to function in specific ways. These signals could be electrical impulses or the release of chemicals. Lastly, the physiologist wants to define and observe homeostasis, in any of the systems studied. In other words how does the body maintain a normal state, and what are the processes by which it does so?

Human physiology is the study of how the body's systems function.
Human physiology is the study of how the body's systems function.

It might be oversimplification to say that human physiology attempts to answer the question of “how things work.” However, this is fairly accurate, and it’s an important question to answer. Understanding the normal function of the body’s systems is valuable because it establishes baselines for understanding what is abnormal. It is very difficult to diagnose disease unless a clear deviation from the norm can be determined, and therefore establishing this norm is of great value in medicine and in human health.

Human physiology determines how parts of the body work, such as the human heart.
Human physiology determines how parts of the body work, such as the human heart.

For instance, over time, physiology and biochemistry have helped to determine what constitutes normal blood levels of certain substances. When something like sugar levels become too high, it may have impact on various systems in the body and be indication of diseases like diabetes. Only by knowing baseline levels for various sugar types in blood, can doctors determine whether diabetes is present. This knowledge has been extrapolated to allow patients to keep records of their own blood sugar at home. With testing they can be assured that they are regulating blood sugar appropriately or they can make medication adjustments when blood sugar levels are too high or too low.

Aristotle is sometimes considered to be one of the earliest physiologists.
Aristotle is sometimes considered to be one of the earliest physiologists.

It’s suggested that early studies in human physiology and anatomy began over 2000 years ago, and names like Hippocrates and Aristotle are usually given as early physiologists. The trouble with early thought was it didn’t allow for many examinations of humans, and most humans examined were dead. The idea of cells wouldn’t be posited until much later in history. Much more was done in the field of anatomy, which is an intricately related discipline to human physiology, that describes the forms present in the body, and yet again, unless these forms were obvious and on the surface, they typically didn’t get much exploration unless a person was dead.

Applied human physiologists may work with athletes who have been injured.
Applied human physiologists may work with athletes who have been injured.

More studies were possible on animals, and actually animal physiology is still used and extrapolated to human beings all of the time. Even today when medical science is much more delicate, most well humans would not consent to studies of some of the ways their body systems work. Few people would volunteer to have abnormal rhythms of their heart induced as part of electrophysiological cardiology studies to determine what causes arrhythmias, as this might be dangerous. However electrophysiologists can induce arrhythmias in animals to determine what factors destroy balance in the electrical system in the heart.

When a human being loses renal function, everything else in the body becomes affected.
When a human being loses renal function, everything else in the body becomes affected.

Over time, human physiology has helped to define the major systems of the body and how they work to achieve wellness. Basic introductory courses tend to look at each of these systems, which may be roughly defined as the following: circulatory, respiratory, endocrine, reproductive, immune, musculoskeletal, nervous, integumentory, renal, and gastrointestinal.

In part, human physiology is concerned with the interdependence between body systems, such as the central nervous system and the musculoskeletal system.
In part, human physiology is concerned with the interdependence between body systems, such as the central nervous system and the musculoskeletal system.

While breaking the body into systems can help describe function, it isn’t always so neat from a scientific standpoint. Systems are interdependent on each other. Lose renal or respiratory function, and everything else becomes affected. Moreover, many vital organs or parts of the body may participate in several systems.

Tricia Christensen
Tricia Christensen

Tricia has a Literature degree from Sonoma State University and has been a frequent TheHealthBoard contributor for many years. She is especially passionate about reading and writing, although her other interests include medicine, art, film, history, politics, ethics, and religion. Tricia lives in Northern California and is currently working on her first novel.

Learn more...
Tricia Christensen
Tricia Christensen

Tricia has a Literature degree from Sonoma State University and has been a frequent TheHealthBoard contributor for many years. She is especially passionate about reading and writing, although her other interests include medicine, art, film, history, politics, ethics, and religion. Tricia lives in Northern California and is currently working on her first novel.

Learn more...

Discussion Comments

Heavanet

This is an interesting point Rundocuri. I can see how such an expert would be good for your needs when it comes to using exercise to help your pain problems. Because he is an expert in the field of human physiology, I'm sure he focuses on how to make your issues better rather than trying to use medications or surgery to mask the pain.

Rundocuri
For anyone who has joint and muscle pain, I suggest seeing a professional who is an expert in human anatomy physiology. I see an exercise physiologist for my issues, and I have had great results. As this article points out, physiology is the study of "how things work." My physiologist seems to have an understanding of this more so than any exercise expert I've used in the past.
Post your comments
Login:
Forgot password?
Register:
    • Hippocrates is sometimes considered a physiologist.
      By: Pakhay Oleksandr
      Hippocrates is sometimes considered a physiologist.
    • Human physiology is the study of how the body's systems function.
      By: alxhar
      Human physiology is the study of how the body's systems function.
    • Human physiology determines how parts of the body work, such as the human heart.
      By: unlim3d
      Human physiology determines how parts of the body work, such as the human heart.
    • Aristotle is sometimes considered to be one of the earliest physiologists.
      By: Panos
      Aristotle is sometimes considered to be one of the earliest physiologists.
    • Applied human physiologists may work with athletes who have been injured.
      By: wellphoto
      Applied human physiologists may work with athletes who have been injured.
    • When a human being loses renal function, everything else in the body becomes affected.
      By: CLIPAREA.com
      When a human being loses renal function, everything else in the body becomes affected.
    • In part, human physiology is concerned with the interdependence between body systems, such as the central nervous system and the musculoskeletal system.
      By: tsuneomp
      In part, human physiology is concerned with the interdependence between body systems, such as the central nervous system and the musculoskeletal system.