large multicellular organisms are made up of organ systems
similar cells are organised into tissues.
a tissue is a group of similar cells which work together to carry out a particular function it can include more than one type of cell.
examples of tissues include muscular tissue- which contracts (shortens) to move whatever its attactched to.
Glandular tissue, which makes and secretes chemicals like enzymes and hormones. epethelial tissue which covers some parts of the body eg inside the gut.
tissues are organised into organs.
an organ is a group of different tissues that work together to perform a certain function. for example the STOMACH is an organ made up of muscular, gladular and epithelial tissues.
organs are organised into organ systems.
an organ system is a group of organs working together to perform a particular function- for example the digestive system.
organ sytems work together to make entire organsisms.
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