general principles

• What are cells known as in living organisms?


  Basic building blocks
• What is the next level of organization after cells?

  Tissues
• What is a tissue?


  A group of cells with a similar structure and function
• What does the cardiac muscle consist of?


  Many individual cardiac muscle cells
• What are organs made up of?


  Groups of tissues
• What is an example of an organ?


  The heart
• What is the function of the heart as an organ?


  To pump blood around the body
• What is the next level of organization after organs?

  Organ systems
• How are organ systems organized?


  Groups of organs work together
• What is an example of an organ system?


  The circulatory system
• How does the heart function within the circulatory system?


  It works with blood vessels to provide blood and nutrients
• What are the levels of biological organization from smallest to largest?


  • Cells
  • Tissues
  • Organs
  • Organ systems
• What is important to know for your exam regarding cells, tissues, organs, and systems?


  • Definitions of each level
  • They increase in size and scale