Shadowing Practice: Physiology Chapter 1 | Introduction to Physiology & Homeostasis Explained - Learn English Speaking with Video

Welcome to another lecture by Medicomedics, Learning Made Easy.

Physiology, Chapter 1, Introduction to Physiology and Homeostasis.

So in this first lecture, we will give you a brief introduction into the subject of physiology, discuss the levels of organization in the body,

present the concept of homeostasis, discuss different components and examples of it, and what happens when the systems are disrupted.

And we will discuss the continuous nature of physiology and end with a summary.

Now, what is physiology?

So physiology is the study of how living organisms function.

It focuses on understanding mechanisms, so how the body works at every level.

An example can be physiology of the heart explains how the heart pumps blood efficiently to sustain life.

So physiology is like a blueprint that explains how everything in the body works together.

Levels of organization in the body.

so let's start at the chemical level where we have atoms

or atoms and molecules like water and proteins this is illustrated right here building on

that we have at the cellular level where we find the basic units of life like nerve cells cardiac cells

and any other cell After that, we reach the tissue level,

so groups of cells working together, like muscle tissue.

Continuing from that, we get to the organ level, where tissues form functional units, for example, the lungs.

Continuing, we get to the system level, where organs performing collective functions.

So, for example, we have the respiratory system.

And continuing on, we get to the organism level, so the body as a whole.

So homeostasis is the body's ability to maintain a stable internal environment despite external changes.

Some examples of regulated variables include body temperature, blood pH, glucose levels in the blood,

and this ensures survival and optimal functioning.

So homeostasis is like being on cruise control.

It keeps your body steady no matter what is going on around you.

Now, what are some components of homeostasis?

Well, the key components include sensors that detect changes in the environment.

For example, thermoreceptors for changes in temperature.

We have the control center processing information and determining responses, like our brain.

Effectors, which act to restore balance, for example, our muscles or glands.

Furthermore, we have something called the negative feedback loop and the positive feedback loop.

Now, negative feedback loops reverse changes to maintain stability.

So, just as a simple example, we have, for whatever reason, an increase in our blood pressure.

There are systems in place where we get alerted or our body gets alerted to the fact that blood pressure has arisen.

So it sets into motion changes to reverse this to reach a stable level.

Obviously, when these natural feedback loops don't function as they're supposed to,

this is when we can start talking about the development of pathologies.

So we might need to assist the patient with medication, for example.

We also have positive feedback loops.

And these amplify changes for specific outcomes.

For example, during childbirth, we want contractions to occur.

Now let's look at an example of homeostasis.

Let's take body temperature.

So the scenario is the body temperature is rising during exercise, right?

Exercise is not a pathology, but our body temperature is increasing during exercise.

What's the response then?

Well, we have sensors detecting this rise in temperature.

Our body temperature is rising during exercise.

What's the response then?

Well we have sensors detecting this rise in temperature.

Our brain activates our sweat glands.

Sweating then cools the body through evaporation.

And the outcome?

Our body temperature returns to normal.

This is a great example of how it's supposed to maintain homeostasis.

Just to give you a little clinical insight here,

we went through that this is during exercise, so this is a normal procedure in day-to-day life, let's say.

But what if body temperature has risen and keeps rising due to an infection?

You have probably at least once in your life experienced having fever.

And if we have an infection, fever might occur.

Now, if that fever keeps increasing to certain levels where the environment

that becomes created due to this elevation of temperature becomes incredibly destabilizing for us

and could lead to failure of organs and eventually even death.

So what do we do then?

Well, we use, for example, antipyretics, so medication to decrease this fever.

One you may know of is, for example, paracetamol or paracetamol.

So in that case, we have an infection, right?

Maybe it's spreading, maybe it's a serious infection.

Our body is not able to maintain its homeostasis.

So this is when your job as a doctor comes in and you identify that the body is not maintaining homeostasis.

This fever is elevating the body temperature way too high.

It's becoming deadly.

So let me give a medication to help decrease this fever

while also treating this infection with antibiotics or whatever it may be.

now what happens then when this this balance of homeostasis actually fails

so disruptions of homeostasis leads to disease

or dysfunction for example diabetes that's a failure to regulate blood

glucose levels a heat stroke is the inability to regulate the temperature.

So restoring homeostasis is the aim of medical interventions.

To understand diseases, we must first master physiology's role in maintaining balance.

Because remember, just like when we went through anatomy or studied anatomy,

you learned, first of all the anatomical position or the anatomic position

and then you reference everything else to that

so you have a reference point

so you don't get lost it's the same here we start with homeostasis what is the normal

and when you go to the doctor you take some blood tests there is always some ranges you are given

and if it's above that range there is a mark usually or if it's below that,

these ranges somehow indicate homeostasis in a way.

And when whatever value deviates from that, there is a disruption, probably due to some disease or dysfunction at some level.

Now, physiology and clinical practice.

So what are some clinical applications of physiology?

For example, blood pressure monitoring ensures cardiovascular homeostasis.

Blood sugar tests evaluate for glucose regulation.

Ventilation adjustments in critical care help maintain oxygen balance.

Now, physiology is dynamic, so the body continuously adapts to internal and external changes.

Systems are interdependent, so changes in one system very often affect other systems.

For example, stress activates the nervous system, the endocrine system, and the cardiovascular system.

So in summary then, physiology explains how the body functions and stays balanced.

Homeostasis is critical for health.

100

Disruptions lead to disease.

101

Understanding physiology is essential for diagnosing and treating illnesses.

102

And that's the end of our first chapter.

103

Continue now to chapter 2.

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108 sentences

Vocabulary and speaking notes for this lesson

This C1 speaking lesson is built on the video “Physiology Chapter 1”. The speaker keeps coming back to these words: example, homeostasis, physiology, temperature, blood. This video has 103 sentences and 1125 words to shadow. The speech runs for 10:06. The speaker talks at a steady 111 words per minute, a comfortable pace for shadowing. Only 79% of the words are among the 3,000 most common in English, so the vocabulary is demanding.

Key vocabulary in this video

The 15 most advanced words in the video, with pronunciation and meaning:

Word	Pronunciation	Meaning
homeostasis noun	/ˌhoʊ.mi.oʊˈsteɪ.sɪs/	The ability of a system or living organism to adjust its internal environment to maintain a state of dynamic constancy; such as the ability of warm-blooded…
physiology noun	/ˌfɪziˈɑ.lə.d͡ʒi/	A branch of biology that deals with the functions and activities of life or of living matter (as organs, tissues, or cells) and of the physical and chemical…
disruption noun	/dɪsˈɹʌpʃən/	An interruption to the regular flow or sequence of something.
glucose noun	/ˈɡluː.kəʊz/	A simple monosaccharide (sugar) with a molecular formula of C₆H₁₂O₆; a principle source of energy for cellular metabolism.
regulate verb	/ˈɹɛɡ.jə.leɪt/	To dictate policy.
sensor noun	/ˈsɛn.sɚ/	A device or organ that detects certain external stimuli and responds in a distinctive manner.
detect verb	/dɪˈtɛkt/	To discover or find by careful search, examination, or probing.
gland noun	/ɡlænd/	A specialized cell, group of cells, or organ of endothelial origin in the human or animal body that synthesizes a chemical substance, such as hormones or…
paracetamol noun	/ˌpɛɹ.əˈsiː.təˌmɔl/	A synthetic compound used as a drug to relieve and reduce fever, usually taken in tablet form.
dysfunction noun	/dɪsˈfʌŋk.ʃən/	A failure to function in an expected or complete manner. Usually refers to a disorder in a bodily organ (e.g. erectile dysfunction), a mental disorder, or the…
pathology noun	/pəˈθɒləd͡ʒi/	The clinical biomedical specialty that provides microscopy and other laboratory services to clinicians (e.g., cytology, histology, cytopathology…
organism noun	/ˈɔɹ.ɡəˌnɪz.əm/	A discrete and complete living thing, such as animal, plant, fungus or microorganism.
cardiovascular adjective	/ˌkɑːdi.əʊˈvæskjʊlə(ɹ)/	Relating to the circulatory system, that is the heart and blood vessels.
atom noun	/ˈætəm/	The smallest possible amount of matter which still retains its identity as a chemical element, now known to consist of a nucleus surrounded by electrons.
activate verb	/ˈæktɪˌveɪt/	To encourage development or induce increased activity; to stimulate.

Phrasal verbs you will hear

Word	Meaning
go through verb	To travel from one end of something to the other.
work together verb	To be coworkers with someone; to share a workspace with someone.

Grammar in this video

The structures the speaker uses most, with the exact words from the video:

Structure	In the video
Passive voice be + past participle — the focus is on what happens, not who does it	are disrupted · is illustrated · are given
Present perfect have/has + past participle — a past action that still matters now	has arisen · has risen

Pronunciation to watch

The speaker uses 3 contractions and reduced forms, such as don't, they're. Say them the short way, as you hear them.

The “th” sounds: pathology /pəˈθɒləd͡ʒi/, childbirth /ˈt͡ʃaɪldˌbɝθ/
The “sh” and “zh” sounds: disruption /dɪsˈɹʌpʃən/, dysfunction /dɪsˈfʌŋk.ʃən/, contraction /kənˈtɹækʃ(ə)n/, evaporation /ɪˌvæpəˈɹeɪʃən/, ventilation /ˌvɛntɪˈleɪʃ(ə)n/
Long words — get the stress right: homeostasis /ˌhoʊ.mi.oʊˈsteɪ.sɪs/, physiology /ˌfɪziˈɑ.lə.d͡ʒi/, paracetamol /ˌpɛɹ.əˈsiː.təˌmɔl/, pathology /pəˈθɒləd͡ʒi/, organism /ˈɔɹ.ɡəˌnɪz.əm/

How to practise with this video

Listen to the whole video once without speaking and note the words you do not know.
Shadow it sentence by sentence at normal speed, repeating each one until your rhythm matches the speaker.
Record yourself and compare with the original, paying attention to words like homeostasis, physiology, disruption.

What is the Shadowing Technique?

Shadowing is a science-backed language learning technique originally developed for professional interpreter training and popularized by polyglot Dr. Alexander Arguelles. The method is simple but powerful: you listen to native English audio and immediately repeat it out loud — like a shadow following the speaker with just a 1–2 second delay. Unlike passive listening or grammar drills, shadowing forces your brain and mouth muscles to simultaneously process and reproduce real speech patterns. Research shows it significantly improves pronunciation accuracy, intonation, rhythm, connected speech, listening comprehension, and speaking fluency — making it one of the most effective methods for IELTS Speaking preparation and real-world English communication.

Shadowing technique: read the full step-by-step guide →

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