Tissue vs. Organ
Key Differences
Comparison Chart
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Energy Requirement
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Repair
Structure
Example
Tissue and Organ Definitions
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Tissue vs. Organ
There is a great diversity of life that exists on earth but, the cell is known as the basic structural and functional unit of life. All life forms are made up of the cell, but its complexities vary from organism to organism. That is why there are different types of species on earth. Some are unicellular while others are multi-cellular. Unicellular organisms are the organisms that are made up of a single cell, e.g., protozoans while multi-cellular organisms are the organisms that are made up of a large number of cells. Such multi-cellular organisms required a proper organization of cells in the body to perform different works. So, in multi-cellular organisms cells are organized properly in different specific levels. Cell, tissue, organ, and organ system are the level of organization in multi-cellular organisms. Some cells combine to make tissue; tissues combine to make an organ, different organs combine to make an organ system and different organ systems combine to make a complete individual. So, the tissue is the group of cells performing the same function while the organ is the group of tissues working together. Connective tissue is an example of tissue while the stomach is an example of an organ. In this article, we will highlight the important differences between them.
What is Tissue?
The word “tissue” is derived from the French word “tissu” which means something that is woven. The tissue is a group of related cells that are performing a specific function in the body. So, the tissue is a cellular organizational level that exists between a cell and an organ. The study of animal or human tissues is known as histology while that of plant tissues is known as plant anatomy. Animals are made up of four types of tissues, i.e., epithelial tissue, muscular tissue, connective tissue, and nerve tissue. Epithelial tissue is the type of tissue that lines the cavities and the surfaces of the body and protects the body from mechanical damage and dehydration. Connective tissue connects and binds the separate tissues and organs together. Muscular tissue provides movement to the body and its different parts. Nerve tissue provides coordination to different parts of the body by transmitting nerve impulse in response to any external or internal stimuli. Plants also made up of three types of tissues known as epidermis, ground tissues and vascular tissues. The epidermis is the tissue that lines all the body parts of the plant such as leaves, stem, and roots. Vascular tissues transport water, food, and nutrients, etc. throughout the plant body. Ground tissue is the tissue that plays an important role in photosynthesis and storage of food.
What is Organ?
An organ is that part of an organism that performs a set of specific functions in the body and is made up of several types of tissues. Different types of organs are present in a multi-cellular organism and are performing different specific functions. Some main organs of the body are the brain, lungs, liver, heart, and kidney. The brain is part of the central nervous system and provides coordination in response to any external or internal stimuli. Lungs are involved in the exchange of gasses between the individual and its environment. The liver acts as a storage organ of the body and stores glycogen etc. The heart is the organ that pumps blood to all parts of the body. The kidney is the main excretory organ of the body and plays an important role in the removal of waste products from the body. In plants, root stem and leave, etc are considered as organs. Different organs of the body combine to make an organ system.
