A tissue is a group of cells with similar functions and structures.
Animal tissues include:
Muscle tissue, which can contract to bring movement
Glandular tissue, to produce substances like enzymes and hormones
Epithelial Tissue, which covers some parts of the body
Plant Tissues include:
Epidermal Tissue, which covers the plant
Mesophyll, which can photosynthesise
Xylem and phloem, which transport substances around the plant.
Organs are made of tissues. The stomach is an organ made of:
muscular tissue to churn the stomach contents
glandular tissue to produce digestive juices
epithelial tissue to cover the outside and the inside of the stomach.
The leaf, stem and root are plant organs which contain epidermal tissue, mesophyll, xylem and phloem.
Groups of organs form organ systems to perform a particular function.
The digestive system has several organs, including the small intestines