Biology: Themes - Levels of Hierarchy Part 2

Picking up from where we left off, we talked about organisms in particular. I'll be brief...

Mind Map 2 Mind Map 2

The structural hierarchy of life continues to unfold as we explore, I guess the architecture of more and more complex organisms. We come across things like organs and organ systems!

Heart... Joanne. &lt;3 Heart... Joanne. <3

I suppose, in a sense... an organ is a part of a body/organism that carries out a particular function in the body. Stems and roots are the major organs of plants for instance. This may some completely obvious to you but that's pretty much it. Examples from the human body include: brain, heart, etc.

Digestive System Digestive System

If we look into complex organisms such as humans ourselves and plants are organised into organ systems. In other words, each organ system is like a team of organs with a role of fulfilling a larger function. For instance, the human digestive system includes organs such as the tongue, stomach, etc.

These organs themselves, consist of multiple tissues.

Tissues, not paper tissues. x"D Tissues, not paper tissues. x"D

These require a microscope for us to see... Each tissue is made up of a group of cells that essentially work together in order to perform a specialised function.

The cell is life's fundamental unit of structure and function. Some have only one cell, such as amoebas and most bacteria. So everything else, such as plants and animals are multicellular.

Here we have a division of labour among particular specialised cells. Like the human body consists of trillions of cells of different kinds: nerve cells, muscle cells and so on.

Cell Diagram Cell Diagram

Inside a cell, there are small structures known as organelles, the various functional components in cells. These can only be seen with a strong microscope... Most cells have similar organelles which are responsible for certain types of chemical reactions!

Leaf Leaf

Speaking of chemical reactions, we have molecules such as chlorophyll in plant cells, one of the most important molecules on Earth. They absorb sunlight when photosynthesis occurs in plants and so on. And we also have chemical reactions occurring in the cells of human bodies and other animals... which goes into Organic Chemistry/Biochemistry!

For those interested in Organic Chem, there are different structures of chlorophyll, here's one of 'em...

c1 c1

Looks like chlorophyll c1, there are others like a, b, and stuff. You can check them out on websites like Wikipedia. x'D

That's pretty much, I guess you could view this as the range of Biology. As you can see, it is a pretty broad subject!

Note by Vishnuram Leonardodavinci
7 years ago

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Its nycoo..

deepika aggarwal - 5 years, 3 months ago

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It's biochemistry right?

Kasimirus Johan - 6 years, 10 months ago

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awesome !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Aditya Gaur - 6 years, 11 months ago

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Well its nice! overall, by the way which class do you study? because i think we are in the same page.

Arya Samanta - 7 years ago

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Finished school. :P x'D

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How could you've finished school at 17? Btw many congrats for making it to MIT. What course are you in?

Krishna Ar - 6 years, 12 months ago

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Thanks good information as always.

Mardokay Mosazghi - 7 years ago

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^^ Glad you liked it!

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Amazing Pictures Vishnuram and As Usual Good Note !

Gabriel Merces - 7 years ago

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Thanks! :-)

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Are you interested in biochemistry??? cause i definitely am!!

Krishna Ramesh - 7 years ago

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Aw yes!!! :D

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Hey Vishnuram you are not 17 year old you are 15 year 10 like me

Jovin Joseph - 6 years, 12 months ago

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