Anatomy

Study of the structure and organization of living organisms.

Levels of Organization in the BodyMajor Organ SystemsAnatomical Terminology and Body Orientation
Microscopic Anatomy: Tissues and CellsComparative AnatomyAnatomy and Disease
Medical Imaging and AnatomyDissection and Hands-On LearningAnatomy in Sports and Fitness
Labeling DiagramsMnemonic Devices
Levels of Organizati...Major Organ SystemsAnatomical Terminolo...Microscopic Anatomy:...Comparative AnatomyAnatomy and DiseaseMedical Imaging and ...Dissection and Hands...Anatomy in Sports an...Labeling DiagramsMnemonic Devices
Basic Concepts

Major Organ Systems

The Big Teams: Organ Systems

Your body is made up of several organ systems—groups of organs that work together to keep you alive and healthy.

Meet the Teams

  • Skeletal System: Bones and joints that support and protect your body.
  • Muscular System: Muscles that help you move and maintain posture.
  • Circulatory System: Heart and blood vessels that transport nutrients and oxygen.
  • Respiratory System: Lungs and airways that help you breathe.
  • Digestive System: Organs that break down food to give you energy.
  • Nervous System: Brain, spinal cord, and nerves that control everything!
  • Others: There are more, like the immune, urinary, and reproductive systems.

How Do They Work Together?

Organ systems depend on each other. For example, your muscular system moves bones in the skeletal system, and your respiratory system brings in oxygen for the circulatory system to deliver.

Why Learn This?

Knowing about organ systems helps you understand how your body works and what happens when something goes wrong.

Examples

  • Your heart (circulatory system) delivers oxygen your lungs (respiratory system) provide.

  • The stomach (digestive system) sends nutrients to the blood (circulatory system).

In a Nutshell

Organ systems are groups of organs that work together for major body functions.

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Anatomical Terminology and Body Orientation