Week 9 discussion

Week 9 discussion - far away from the external environment....

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Why so small? I believe that cells are so small because we need many different kinds of cells (like liver cells, skin cells, etc.) and because of the need for diffusion. If we were made up of only one huge cell, there would be no diffusion between cells, no way to take in nutrients or eliminate waste. We need lots of different kinds of cells in our bodies in order for them to operate properly. There must be white blood cells to fight infection; there must also different types of cells to make up the different organs in the body. If we were just one huge cell, we would be like a giant amoeba. This would mean that a portion of our cell would be far away from the external environment and not able to absorb nutrients or expel waste easily. This would answer the question as to why amoeba are so small, so that no one part of them is too
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: far away from the external environment. Prokaryotic cells are smaller than eukaryotic cells, I believe, because they do not contain the organelles that eukaryotes do and their DNA is not contained in a nucleus. The nucleus is very large inside of a cell. I believe that a unicellular organism is more complex even if they do not have all of the organelles that a cell from a multicellular organism has. I believe this is true because the unicellular organism has no other cells to rely one but itself. It must carry out all of its functions without the benefit of having other cells around to aid it. If something goes wrong, the cell has no one to fall back on and my die from one mistake. In order to sustain life on a unicellular lever, the cell must be tough and strong enough to do everything on its own....
View Full Document

This note was uploaded on 10/31/2010 for the course BIO 1320 taught by Professor Scott during the Spring '10 term at Western New Mexico.

Ask a homework question - tutors are online