070 What is a Disease

As promised, here is the start of a set of new videos to be uploaded to the site. Let’s start off this year by learning what a disease is from a Biological perspective.

Also, you’ll notice something new with the video format. Let me know what you think.

Have fun!

Transcript of Today’s Episode

Hello and welcome to another episode of Interactive Biology TV where we’re making Biology fun. My name is Leslie Samuel and in this episode, Episode 070, I’m going to be answering a simple question, What is a disease? I know what you’re thinking. Everybody knows what a disease is. But, since this Interactive Biology, we’re going to look at it from a Biological perspective. So, let’s get right into it.

A disease is an abnormal condition that affects the body of an organism.

What’s an organism? An organism is a living thing. And, when we’re talking about Pathology, or Pathophysiology, we’re talking about human beings. So, we’re talking about an abnormal condition that affects the body of a human being. A disease is usually associated with a number of symptoms or signs. But, what does these all really means?

Okay, so we have an abnormal condition affecting the body. But, what is the body? I know what you’re thinking, the body of a human being is made up of systems. So, we have the circulatory system, we have the muscular system, the skeletal system, the urinary system, all of these different systems that come together to form a human being.

But, what are these systems? I know what you’re thinking now. You’re thinking these systems are made up of organs, and you’re right! For example, the circulatory system is made of the heart, and the blood vessels and all these things come together to form the circulatory system.

But, what is an organ? I know what you’re thinking because you’re smart. An organ is made up of tissues. All right, so we have it down to the tissue level. But, what is a tissue? Finally, you’re there. A tissue is made up of cells. All living things — human, or dog, or cat, or wolf, whatever it is, all living things are made up of cells.

So, if you have an abnormal condition that affects an organism, that’s because we have something that’s affecting one or more of the organ systems. And then, of course, it’s affecting one or more of the organs, one or more of the tissues, and one or more of the different cell types. So, in essence, what we’re saying is, if we have a disease, we have an abnormal cellular structure, and/or function, there is something wrong at the cellular level that’s causing this thing to be manifested on the level of the organism.

Now, there are many different types of diseases. But, I’m going to tell you something that’s going to make it much more simple. All of these disease can be attributed to one of five causes. Doesn’t that sound simple? If we know these five causes, we could explain to some level every single disease that’s out there.

What are those five causes? That’s what we’re going to talk about in the next episode.

That’s all for this episode. Once again, I want to invite you to come back to the website at Interactive-biology.com, where you’re going to find more videos just like this, and many other resources to help you make Biology fun.

By the way, what do you think about this new video format? Let me know in the comments below. That’s it for now, and I’ll see you in the next video.



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Leave a Reply

  1. Body language, main thing we get from the video 😀
    But I’d also like know what cancer is, understand how food can cause it. We hear about cancer all over, but we don’t know anything about it…

  2. Body language, main thing we get from the video 😀
    But I’d also like know what cancer is, understand how food can cause it. We hear about cancer all over, but we don’t know anything about it…

  3. A much improved video format! Great job! The world needs more educators like you. Godspeed!

  4. Its great to see you while you explain things 🙂 Its better to see you talk, especially when you dont need the screen to draw things. The new sounds are cool too.. really proffessional Interactive biology is really growin, and it is great to be a part of it! Thank you, and keep up the good work.

  5. Its great to see you while you explain things 🙂 Its better to see you talk, especially when you dont need the screen to draw things. The new sounds are cool too.. really proffessional Interactive biology is really growin, and it is great to be a part of it! Thank you, and keep up the good work.

  6. I think this new format is great. You can change the background every now and then and you can mix different formats as well. I know it is a lot of work , but transcriptions might be very useful too.

  7. I think this new format is great. You can change the background every now and then and you can mix different formats as well. I know it is a lot of work , but transcriptions might be very useful too.

  8. @alsanagust Thanks for the feedback. I will eventually go to using multiple formats. Btw, all of the transcripts are included on my site, so you can check them out there. See the link in the description of any video.

  9. Thanks for the feedback. I will eventually go to using multiple formats. Btw, all of the transcripts are included on my site, so you can check them out there. See the link in the description of any video.

  10. Thanks for the feedback. I will eventually go to using multiple formats. Btw, all of the transcripts are included on my site, so you can check them out there. See the link in the description of any video.

  11. Nice format and great channel! I have one question on your cellular respiration video: Doe cell only use Glucose + O2? Or can the cell use other simple carbohydrates like Sucrose or Fructose combined with O2? Thanks! I’m learning a lot from your channel! Keep it up.

  12. Nice format and great channel! I have one question on your cellular respiration video: Doe cell only use Glucose + O2? Or can the cell use other simple carbohydrates like Sucrose or Fructose combined with O2? Thanks! I’m learning a lot from your channel! Keep it up.

  13. The new format is great. I am more interested in the information you give. You definitely make it interesting. Some instructors simply can’t do it!

  14. The new format is great. I am more interested in the information you give. You definitely make it interesting. Some instructors simply can’t do it!

  15. Love it. I’m the one investigating gray hair. So gray hair comes from a cellular aging. I get it now. But on to more research on hair. Thank you.

  16. LOVE THE NEW FORMAT!!!!
    Extreme Excellence 🙂
    I’m inspired!!!

    -Rochelle
    Simply Natural Ideas

  17. i want the difference between….DISEASE/DISORDER/SYNDROME/..OTHERS IF ANY SIMILAR TERMS EXISTS….CAN YOU PLZ RESPOND TO THIS QUESTION…I AM WAITING FOR UR ANSWER……….

  18. i want the difference between….DISEASE/DISORDER/SYNDROME/..OTHERS IF ANY SIMILAR TERMS EXISTS….CAN YOU PLZ RESPOND TO THIS QUESTION…I AM WAITING FOR UR ANSWER……….

  19. I like the new format!! Thank you for making these videos, it definitely makes biology easier 🙂

  20. I like your vedios
    reallly thank you
    i enjoy when i watch your vedios
    i go in a journey from a vedio to another
    i forget my self
    ^_^

  21. I like your vedios
    reallly thank you
    i enjoy when i watch your vedios
    i go in a journey from a vedio to another
    i forget my self
    ^_^

  22. I like your vedios
    reallly thank you
    i enjoy when i watch your vedios
    i go in a journey from a vedio to another
    i forget my self
    ^_^

  23. Thank you Leslie. I just discovered your site a few days ago and have watched a lot. You are an excellent teacher and you present information in a lovely bite size manner. Well done. Keep them coming.

  24. Thank you Leslie, so good to see your energetic way of teaching and your ever smiling face makes your topic more delightful to listen to. I am watching from Denmark and have learned and am learning so much from you. Keep up the good work please.

  25. Thank you Leslie, so good to see your energetic way of teaching and your ever smiling face makes your topic more delightful to listen to. I am watching from Denmark and have learned and am learning so much from you. Keep up the good work please.

  26. Hi Leslie,
    I am a 73 year old active squash plyyer sincw 1959 with in excess of 6 000 competitive matches behind me. So all systems of my body have been have been regularly used and tested.
    I have always had a lay person’s interest in how our bodies work in order to
    understand how to best maintain fitness in an aging body and brain.
    I stumbled across your website a few weeks ago and have watched most of your videos.
    They are AWESOME!AWESOME!AWESOME! Clearly and simply presented with a dash of light humour. I wish they had been available 50 years ago.
    I suspect Mitochondria play a crucial and as yet not fully understood key to longterm health and fitness.
    Cheers and keep up your excellent work.
    Haydn Daly
    Australia.

  27. THANKS A LOT FOR YOUR VIDEOS. THEY ARE WONDERFUL AND I ENJOYED THEM. BUT PLS IS THERE ANY POSSIBILITY OF ARRANGING THEM IN A SERIAL ORDER AS IN A PLAYLIST? EG VIDEOS …1,2,3,4,5,6 ETC. SECONDLY, IS THERE ANY POSSIBILITY OF HAVING A TRANSLATED TEXT THAT ONE CAN READ AT A CONVINENT? THANKS ONCE MORE AND BYE FOR NOW. HOPE TO HEAR FROM YOU

  28. Dear Leslie Samuel,
    I just came across this website and the selection of videos you narrate. I am transitioning to a career in Teaching, specifically High School Biology, and am searching ideas for how to make Biology fun. I wanted to leave you a quick comment and compliment you on the work you are doing. More specifically, I am enjoying your “new video format”, though perhaps not new anymore depending on when you made the migration. Thanks for “keeping it real” and coming across so genuine in teaching a field that is often percieved as very difficult, dry, etc. I plan on taking advantage!! Thanks again. Good luck with in all of your endeavors. 🙂

  29. Great Job! Hit the point, easy explination and very friendly attitude! Lots of videos associated to Anatomy, biology and physiology gives me headache… but this one made me smile 🙂 Thanks xxx

  30. I love this guy, and love the way he explains things in a easy and interesting way 🙂

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