Levels of Organization - Anatomy and Physiology
- What is the simplest level of organization that is considered alive?
- The cellular level. The cell is the smallest unit that carries out all functions of life.
- What are the levels of structural organization of the body, from simplest to most complex?
- Chemical, cellular, tissue, organ, organ system and organism.
- At which level of organization does a single cardiac muscle cell belong?
- The cellular level. Many such cells together make up cardiac muscle tissue.
- What are emergent properties in the levels of organization?
- Properties that arise from interactions among parts at a higher level and are not present in the individual parts alone.
- At which level of organization does the stomach belong?
- The organ level. It contains all four tissue types working together to store and digest food.
- What are the four primary tissue types of the body?
- Epithelial, connective, muscle and nervous tissue.
- What defines an organ?
- A distinct structure made of at least two tissue types that performs a specific function.
- What is an organ system?
- A group of organs that work together to accomplish a common purpose, such as the digestive system.
- At which level of organization does the endothelium lining blood vessels belong?
- The tissue level. It is a sheet of simple squamous epithelium.
- What is a tissue?
- A group of similar cells and their extracellular material that work together to perform a common function.
- At which level of organization does a DNA molecule belong?
- The chemical level, which includes atoms and the molecules they form.
- The kidneys, ureters, urinary bladder and urethra together make up which level of organization?
- The organ system level. Together they form the urinary system.