1. 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

2. 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.

3. 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.

4. 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?

6. 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?