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en.wikipedia.org/wiki/Tissue_(biology)

In biology, tissue is a cellular organizational level intermediate between cells and a complete organ. A tissue is an ensemble of similar cells from the same origin that together carry out a specific function. Organs are then formed by the functional grouping together of multiple ... The epithelial tissues are formed by cells that cover the organ surfaces such ...

en.wikipedia.org/wiki/Organ_(anatomy)

In biology, an organ or viscus is a collection of tissues joined in a structural unit to serve a ... A hollow organ is a visceral organ that forms a hollow tube or pouch, such as the stomach or ... Two or more organs working together in the execution of a specific body ... The functions of organ systems often share significant overlap.

www.khanacademy.org/science/biology/principles-of-physiology/body-structure-and-homeostasis/a/tissues-organs-organ-systems

All the systems of the body work together to keep an organism up and ... As we saw above, every organ is made up of two or more tissues, groups of similar cells that work ... Specialized forms of connective tissue include adipose tissue—body  ...

www.bbc.co.uk/education/guides/z9hyvcw/revision/6

Study animal and plant cells with BBC Bitesize KS3 Science. ... Organs are made from tissues, and systems are made from several organs working together. ... An organ system is made from a group of different organs, which all work together ...

www.merckmanuals.com/home/fundamentals/the-human-body/tissues-and-organs

Explore the Tissues and Organs from the Home Version of the Merck Manuals. ... The cells in a tissue are not identical, but they work together to accomplish specific functions. ... Each organ is a recognizable structure (for example, the heart, lungs, liver, eyes, and stomach) that performs specific functions. ... Organ Systems.

www.kidsbiology.com/biology_basics/cells_tissues_organs/structure_of_living_things2.php

Many tissues come together to form what biologists call an organ. This is like a city in the previous example. Organs then work together to form a system, and ...

www.exploringnature.org/graphics/anatomy/levels_organization_Activity.pdf

There are many kinds of cells in the human body, such as muscle cells, bone cells, skin ... groups of cells that work together to form tissues and organs that are  ...

www.factmonster.com/dk/encyclopedia/science/body-systems

Different body systems consist of collections of cells, tissues, and organs with a common ... The respiratory system is centred on the lungs, which work to get life- giving oxygen ... Cells group together to form tissues, each with specific functions.

www.quia.com/jg/1374580list.html

In a living organism, many different parts often work together to, perform an important ... A group of organs that interact and function together is a(n), system ... in your body? smallest to largest: cells, tissue, organs, organ systems, and organism.

www.biologyreference.com/Ta-Va/Tissue.html

A tissue is made up of a group of cells that usually look similar to one ... The group of cells that make up a tissue have physiological functions that work together in ... Groups of different kinds of tissues are organized together to form organs, ... Connective Tissue ; Epithelium ; Muscle ; Nervous Systems ; Neuron ; Organ ; Skin.