Cellular Organisation Key words: Muscular tissue, glandular tissue, epithelial tissue Starter: Give 3 differences between a plant and an animal cell.

The big picture: “How is the digestive system organised?” Learning outcomes: To describe how cells, tissues, organs and organ systems are organised. To compare the different types of tissues. To apply knowledge to the human digestive system.

Task 1 Match up the definitions and examples for each level or organisation in an organism. LO: To describe how cells, tissues, organs and organ systems are organised.

Level of organisation (smallest to biggest) Definition Example in plants Example in animals Cells Tissues Organs Organ system Organism

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

Types of tissues A tissue is a group of cells with similar structure and function. Examples of tissues include: ■ muscular tissue, which can contract to bring about movement ■ glandular tissue, which can produce substances such as enzymes and hormones ■ epithelial tissue, which covers some parts of the body.

Task 2 You will have 5 minutes to learn about each type of tissue in the human body. You should Read and highlight the information Stick in each sheet in your book Answer the questions on your book.

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 does 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. Give the name of a hormone produced by the human body

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? What are they evolved to do? Where in the body would you find epithelial tissue?

Task 3 Apply your knowledge of cell organisation to the human digestive system.

Where will you find epithelial tissue? What are some of its functions? Name 1 substance produced by glandular tissue, and the organ(s) that produce it What is the job of muscle tissue?

List the following structures, starting with the smallest Plenary: Size and scale in relation to cells, tissues, organs and organ systems... List the following structures, starting with the smallest Liver Human cheek cell Mitochondrion Bacterial cell Heart Digestive system Ribosome