Which of the following levels of organization in the human body is the most inclusive?

Question

Quizplus · Accepted Answer

The levels of organization in the human body consist of cells, tissues, organs, organ systems, and finally the organism.
The smallest unit is the cell, which is the basic unit of structure and function in living things.
Tissues are groups of similar cells that perform the same function. The human body contains four basic types of tissue: muscle tissue, nervous tissue, connective tissue, and epithelial tissue.
An organ is a structure that is made up of different kinds of tissue. Your heart, brain, and kidneys are all examples of organs.
Each organ in your body is part of an organ system, which is a group of organs that work together to perform a major function. Your heart is part of your circulatory system, which carries oxygen throughout the body. In addition to the heart, blood vessels are major structures in the circulatory system.
An organism refers to the entire living thing. You are an organism. 
The diagram below shows the hierarchy of organization within an organism. In this case, the organism is a mouse:
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Which of the Following Levels of Organization in the Human