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Organ Definition

An organ is a group of different tissues that work together to perform a specific function. For example, the heart and stomach are organs.

View Lesson on Multicellular Organisms
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Multicellular Organisms

LESSON MATERIALSmove

Fun Facts

  • The heart is an organ made from muscle tissue, connective tissue, nerve tissue, and epithelial tissue.
  • Leaves are organs that make food for plants.
  • Plants have organs such as roots and stems.

Why Do We Need To Know About Organ

Learning about organs helps us understand how complex the human body is and why doctors need to know a lot about them. Different doctors spend a lot of time learning about how organs work and how they affect our health.

This knowledge is important for doctors, but also for anyone studying biology and how the body works. By doing things like dissections, students can see how organs like the heart and brain work together, showing how useful it is to learn about organs for school and jobs in healthcare.

Frequently Asked Questions

How do the various parts of the body work together when we eat something?
When we eat something, food travels through our digestive system, which includes our mouth, stomach, intestines, and other organs. After food is digested, our bodies use it for energy and to help us stay healthy. We eliminate food we don’t need as waste through our excretory system.
How are plant and animal structures similar? How are they different?
Plants have different parts that need to work together, but they are different from animal parts. Plants get their energy and make their food using the Sun, and animals need to eat to get energy.
How is our body system organized?
Our body is made of cells, cells work together to form tissue, tissues make up organs, organs make up our body’s subsystems, and all the subsystems work together to keep our body system alive and healthy.
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