( BIOLOGY ) Cell organisation

• What is a tissue?

  group of similar cells that perform a specific function group
• What is an organ?

  structure made of different Tissues that work together
• What is an organ system

  Multiple organs cooperating together as a system
• What is an example of a tissue in the human body?

  Muscle tissue , nervous tissue , connective tissue , epithelial tissue
• What is an example Of an organ in the human body

  Heart , lungs , liver , stomach
• What is an example of an organ system in the human body?

  circulatory system , respiratory system , digestive system , nervous system