An organ is a group of tissues with similar functions. Plant life and animal life rely on many organs that coexist in organ systems.

Organ system

An organ system is a group of organs that work together as a biological system to perform one or more functions. Each organ does a particular job in the body and is made up of distinct tissues. There are eleven distinct organ systems in human beings, which form the basis of anatomy. Other animals have similar organ systems, although simpler animals may have fewer organs in an organ system or even fewer organ systems. Plants too have organs, such as flowers and leaves, and these are grouped into organ systems as well.

  • Respiratory system
  • Digestive system
  • Cardiovascular system
  • Urinary system
  • Integumentary system
  • Skeletal system
  • Muscular system
  • Endocrine system
  • Lymphatic system
  • Nervous system
  • Reproductive system