Summary Ati Teas Study Guide of General Anatomy and Physiology of a Human| Fundamental nursing skills

- Lowest hierarchy is at the organelles within a cell - Cells with the same functions collected into larger groups -> tissues - Tissues are collected into organs which carry out a single task - Organs work together in organ systems that perform large-scale functions Cell Parts - Organelles -> cell parts that function within a cell o Coordinate with other organelles to perform a cell’s basic functions - Ribosomes -> carry out protein synthesis - Golgi Apparatus -> modifies & packages proteins secreted from a cell - Mitochondria -> convert energy present in chemical bonds of food accessible to the cell - Nucleus -> stores & processes instructions contained in the DNA that tell the cell what its functions are Cells - Smallest living unit of life - In humans, some cells function autonomously; ex. Phagocytic white blood cells - Cells highly specialized to perform a specific function Organs - Structures composed of several types of tissues & perform one or more functions Organ Systems - Functional units composed of several organs - Functions include: digestion of food, circulation of nutrients, remova