Human Anatomy & Physiology (9th Edition)

Published by Pearson
ISBN 10: 0321743261
ISBN 13: 978-0-32174-326-8

Chapter 1 - The Human Body: An Orientation - Review Questions - Page 21: 2

Answer

Cells are the building stones on which every living organism requires. Cells are what keeps the human body in its form. Even though cells are microscopic, they can vary in the sizes just as atoms do. These cells can take up more or less space depending on the type of cell that they are. For example the neuron and muscle cells are larger than that of the Squamous epithelial cells. Cells are broken into many different parts and types, all of which have an important role that they play. These cell parts are listed as the Golgi apparatus, the nucleolus, nucleus, endoplasmic reticulum, the mitochondria, vacuoles, cell membrane and the outer cell wall. Each doing their own part in order to make the body function.

Work Step by Step

Human cells can vary in shape and size depending on what type of cell they are, and what they are used for. Cells are one of the smallest parts that can keep things functioning inside the human body. These cells are essential for things such as nutrition, digestion, respiration, excretion through the body, and reproduction. Cells also deliver oxygen around the body, and some cells, (the white blood cells for example) also fight off harmful bacteria that enters the bodies system. Cells learn to adapt to the environment around them, this is essential for life and the way we live. Without cells living things would not exist, nor would this world as we know it.
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