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

2. 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.

3. 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.

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

5. 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

6. 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.

7. 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.

8. 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.

9. 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

10. 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?

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

13. 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?

14. 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