Organ Systems, Cells, Tissues or Cells and Tissues: These two concepts are very important to know when studying human anatomy. Organ systems refer to the entire group of tissues and organs that make up the body. Cells and tissues are the unitary system of living organisms. Each organ or cell or tissue has an endocrine, respiratory, and nervous system connected to it.
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If you understand the concept of the organ systems, you can also see that each cell or tissue is a subsystem of the organism. All cells have both ends and beginning. Cells in the pancreas for example, has endocrine systems (tendons) that allow cells to break down fat and release energy in the form of glucose.
On the other hand, cells in the pancreas endocrine systems have begun by digesting the food, they then release amino acids to be used as fuel in the body. As the cells break down fats, they take up calcium, which is required for the growth of bone and muscle. Cell for cell they are working as directed, they function.
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The information on this worksheet will cover cells, tissues, and mitochondria. Cells and tissues are the heart of your organism and we have more than 100 trillion cells per body, and each cell has at least three tissues, the cell membrane, which form the outermost layer of the cell, the cytoplasm, which is the liquid substance inside the cell, and the nucleus which control cell division and gene expression.
It is very important that you understand the word tissue, because this word describes all cellular organ systems. Just think of the entire organism as a huge, multi-layered picture.
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Cells are different from one another because they differ in size, shape, and form. With that being said, cells and tissues are different than organs, they are parts of cells and organs.
So cells and tissues do not just come in one size or shape, and they do not all have the same number of tissues. There are microscopic cells, for example, which are microscopic because they do not contain a nucleus, therefore they have no endocrine systems, they are no respiratory systems, they are just part of the organ system. They have their own organs and they are functional as directed. So too, there are organs and tissues that have no cells and they are simply functioning as part of the body’s entire system.
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For example, the mitochondria, which is a very small organ. It has no nucleus, thus no endocrine systems, no respiratory systems, and no cell membranes. Just like cells and tissues, mitochondria have functions as directed, they are part of the body’s whole.
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