Level of organisation (smallest to biggest) Definition Example in plants Example in animals Cells A group of cells with a similar structure and function, which all work together to do a particular job. Daffodil Digestive system Tissues Made from a group of different tissues, which all work together to do a particular job. Palisade cell Stomach Organs Made from a group of different organs, which all work together to do a particular job. Leaf epithelium Human Organ system The smallest unit of an organism Leaves Glandular cells Organism An individual plant, animal, or single-celled organism. Photosynthetic system Stomach lining

A: Muscular tissue Muscle is a very specialised tissue that has both the ability to contract and the ability to conduct electrical impulses. Muscles are classified functionally as either voluntary or involuntary. Questions What does specialised mean? What are the two things that muscle tissue can do? Give an example of a muscle with contracts voluntarily and one that contracts involuntarily.

B: Glandular tissue Glandular tissue is involved with delivering hormones in the body. This tissue is rich in capillaries. Each cell must contact a capillary directly in order to deliver its hormone to the rest of the body. Questions Give one example of where glandular tissue is found in the body. Why must the glandular tissue be close to capillaries. Why would the human digestive system need glandular tissue.

C: Epithelial Tissue Epithelial tissue covers the whole surface of the body. It is made up of cells closely packed in one or more layers. This tissue is specialised to form the covering or lining of internal and external body surfaces. Epithelial tissue that occurs on surfaces on the interior of the body is known as endothelium. Questions How are epithelial tissues specialised? Where in the body would you find epithelial tissue?

Where will you find epithelial tissue? What are some of its functions? Name 1 substance produced by glandular tissue, and 2 organs in the digestive system where you might find it. What is the job of muscle tissue?