The term "cell wall" refers to a rigid outer layer that surrounds some types of cells, providing structural support and protection. It is primarily found in plant cells, fungi, and certain prokaryotic organisms (like bacteria), but it is not an organ or an organ system.
Here’s a brief breakdown:
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Organs: These are structures within an organism that are composed of tissues and perform specific functions. Examples include the heart, liver, or lungs in animals, and leaves, roots, or stems in plants.
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Organ Systems: These are groups of organs that work together to perform complex functions for the body. Examples include the circulatory system, respiratory system, and digestive system in animals, and the root system or shoot system in plants.
The cell wall is critical for maintaining cell integrity, regulating the movement of materials, and providing protection against mechanical stress and pathogens, but it is not classified as an organ or organ system.