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Answer:
Cells make up tissues, tissues make up organs, and organs make up organ systems. The function of an organ system depends on the integrated activity of its organs. ... The survival of the organism depends on the integrated activity of all the organ systems, often coordinated by the endocrine and nervous systems.
Explanation:
Answer:
A cell is a tiny unit of living material surrounded by a thin membrane. It does all of the things that living organisms do. It grows, reproduces, responds to its environment, uses energy, and produces and gets rid of waste. Eventually it dies. Many organisms consist of only one cell. They are unicellular. The majority of unicellular organisms can be seen only through a microscope. However, most of the living things that we see without a microscope are made of millions and millions of cells. These living things are called multicellular.
You are a multicellular organism. Your body is made of trillions of cells. Each cell in your body is designed to perform a task. A tissue is a group of cells working together.
Like cells that work together to form tissues , some different kinds of tissues work together to form organs. Your heart is an example of an organ.
Organs also work together to form systems. Without our blood vessels and blood to complete the circulatory system, our heart would do us little good. But no matter how different the tasks that systems, organs, and tissues have, they all start with individual cells.