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Are cells a big part of our bodys?
Question Date: 2009-05-21
Answer 1:

Yes cells are a big part of our bodies in two ways, first because most of our body weight is made of cells. About 60% of our body weight is water and about two thirds of that is inside cells. A lot of the rest of the weight is cells.

Second, because cells are what makes or organizes most of the rest of our weight. Cells break down some molecules and build up other ones, including protiens, fats, sugars, and DNA. Cells make proteins and other things that do their jobs outside the cells. Hair and fingernails are made of a protein called keratin. Collagen is another protein made by cells. It is part of our skin. Cells also pump salts around, which moves water.

Many things in our bodies are combinations of cells, cell products, and water. Something like blood contains a lot of water, along with red blood cells for carrying oxygen, white cells for fighting disease, and platelets, which ar pieces of cells and help the blood clot. There are also lots of protiens, sugars, and various other fuels, wastes, and signals. Bones are made of minerals, proteins, water, and live cells that constantly make and break down the bone.

Cells are also small parts of our bodies. We're made of trillions of cells. (A trillion is a 1 with 12 zeros.) Each one is tiny, but together, they can build the largest animal that has ever lived, the blue whale.

Anything that has ever lived has been made of cells. Some things are only one cell big. Which do you think came first, things made of one cell, or multicellular things? What's the advantage of having many different specialized cells instead of one cell?

There's a nice site on cells at:
click_hereThanks for asking.

Answer 2:

Cells are the fundamental units of life on our planet. All organisms, including cells, are composed of cells. Cells contain water and many other large and small molecules - in fact, about 10,000 different types of molecules are in each cell (on average). A human body has about 60 TRILLION cells! When you think about it, it is pretty amazing - all those cells came from just a single cell - a fertilized egg! And when you look at the different types of cells in a human body, not only do you deal with that very large number, but there are many TYPES of cells- your blood cells, neurons, heart, muscle, etc... You have probably heard it said that our bodies are "mostly water." that is true, but that water is contained primarily within those 60 trillion cells. Another very interesting thing is that the principles that underlie the functions of a single celled organism, like a bacterium, are very similar to those principles that govern the cells in a human body. So the very short and to the point answer to your question is "YES!" Keep asking good questions!

Answer 3:

Every tissue in our body is made up of millions and millions of cells. Depending on if it is your kidney, or your skin, the cells are a little different in order to do the job they need to do. Skin cells need to be able to protect our bodies and need to be able to re-grow very quickly if we are injured. Kidney cells need to be able to filter out the bad stuff and un-needed nutrients from our blood.

Answer 4:

Cells are the building blocks of our bodies. Think of our bodies as a book,full of chapters, words and letters. Chapters are similar to our systems(nervous system, endocrine system, vascular system, etc) Each of our systems (book chapters) are made up of organs (heart, lungs, stomach, skin,etc). Organs are similar to words, in that the words work together in a specific order to make a chapter of a book just like organs work together to make up our systems. So lastly cells are similar to letters. Letters come together in a specific order to make each word and each work is made up of different letters. Cells come together in a specific order to make organs.While this is somewhat simplified, it hopefully shows how much a part cells play in our body.

Answer 5:

Yes. Our bodies are made of cells (about 100 trillion of them for an average-sized human).

Answer 6:

They make up all parts of our bodies.

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