When a group of cells work together on a common task, they form tissue. Tissues that work together and are joined to form a structure are an organ. Organs are prominent in large organisms but have also been seen in plants and some bacteria.

The human body contains 22 internal organs and five of them are considered vital. Vital organs are ones that no human can live without. The vital organs include: kidneys, liver, lungs, heart, and brain. All other internal organs are important but the human body can still survive without them.

Plants have two types of organs: reproductive and vegetative. Reproductive plant organs are ones responsible for plant reproduction. They vary depending on the specific plant type but will contain tissue responsible for reproduction. In flowering plants, reproductive organs consist of seeds, fruits, and the flower itself. Cones will be the reproductive organ in cone-bearing plants.

Vegetative organs are those that are responsible for keeping the plant alive. Photosynthesis is performed by vegetative organs. In plants that reproduce asexually, vegetative organs are responsible for reproduction.

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