BIOL 101 (Human Anatomy and Physiology)
South University
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ATI TEAS 6 - Science (Human Anatomy and Physiology) Latest Study Guide.
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ATI TEAS 6 - Science (Human Anatomy and Physiology) 
 
 
Hierarchy of Structures 
 
Lowest Hierarchy level is at Organelles within a cell. They obtain energy from food and reproduction. 
-Cells with the same function are collected into larger groups called Tissues. 
-Tissues are collected into Organs, carry out single task, like oxygenated blood (lungs), or filter out waste (kidneys). 
-Organs work together in systems that perform coordinated large-scale functions, like nourishing the body (dige...
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