PATHOLOGY

Detailed explanation-1: -Small cells are most efficient at taking up oxy-gen and nutrients from the environment. (Note that they are also able to release waste carbon dioxide more efficiently.)

Detailed explanation-2: -Large cells it is not the large cells and it is not the medium sized cells. Our answer here is we have the small cells. So the small cells are so efficient at obtaining nutrients.

Detailed explanation-3: -Cell size is limited by a cell’s surface area to volume ratio. A smaller cell is more effective and transporting materials, including waste products, than a larger cell. Cells come in many different shapes.

Detailed explanation-4: -Small cells, therefore, have a large surface area to volume ratio. The large surface area to volume ratio of small cells makes the transport of substances into and out of cells extremely efficient.

Detailed explanation-5: -Cells are so small because they are easier to replace, and a cell needs to be small to be able to perform the tasks a cell needs to do. If cells were bigger it would be harder for the body to replace the cell without disrupting what is going on in the body and delaying a process.