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Aug 14, 2020 · Figure 1.1.1 1.1. 1 Hierarchical levels of organization of the human body from the smallest chemical level to the largest organismal level. Read the description, and examples for each level in the pyramid: Chemical level, Cellular level, Tissue level, Organ level, Organ system level, and Organismal level.
An organ is a group of tissues that has a specific function or group of functions. Organs can be as primitive as the brain of a flatworm (a group of nerve cells), as large as the stem of a sequoia (up to 90 meters, or 300 feet, in height), or as complex as a human liver. The most complex organisms (such as mammals, trees, and flowers) have ...
At the highest level of organization, the biosphere is the collection of all ecosystems, and it represents the zones of life on earth. It includes land, water, and even the atmosphere to a certain extent. Figure 4.2.2 4.2. 2: The biological levels of organization of living things are shown.
Feb 28, 2021 · An organ system is a higher level of organization that consists of functionally related organs. Mammals have many organ systems. For instance, the circulatory system transports blood through the body and to and from the lungs; it includes organs such as the heart and blood vessels. Organisms are individual living entities.
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Jul 30, 2022 · Just as the various bodily organs work together in harmony to perform all of a human’s functions, the many different cellular organelles work together to keep the cell healthy and performing all of its important functions. The organelles and cytosol, taken together, compose the cell’s cytoplasm. The nucleus is a cell’s central organelle ...
2.1: Prelude to The Cellular Level of Organization. You developed from a single fertilized egg cell into the complex organism containing trillions of cells that you see when you look in a mirror. During this developmental process, early, undifferentiated cells differentiate and become specialized in their structure and function.
