cell organisation

• large multicellular organisms are made up of organ systems
• a tissue is a group of similar cells that work together to carry out a particular function
• muscular tissue contracts to move whatever it's attached to
• glandular tissue makes and secretes chemicals like enzymes and hormones
• epithelial tissue covers some parts of the body
• tissues are organised into organs
• the digestive system breaks down and absorbs food
• the digestive system is made of glands ; the stomach ; the liver ; the small intestine and the large intestine