Level of Organisation
Sunday, 15 September 2019
Key words:
Starter:
Give 3 differences between a plant and an animal cell.
Learning Outcome : Understand the organisation
of the body.
Learning Objectives:
• Identify the levels of organisation in the
human body. Cells, tissue, organelle, organs,
organ system.
• Name the main body systems. Skeletal,
Muscular, Respiratory, Circulatory, Nervous,
Endocrine.
Order the words below in your pyramid. Have the
smallest on the bottom and work up to the largest.
Organelle
Organ system
Organ
Cell
Organism
Tissue
If you do this you can try and fill in the other side of the triangle with the
specific example e.g. an example of an organelle is a nucleus
Activity 1.
• Match up the definitions and examples for
each level or organisation in an organism.
• Extra challenge: try to think of different
examples for plants/animals for each level of
organisation.
Level of
organisation
(smallest to
biggest)
Cells
Tissues
Organs
Organ system
Organism
Definition
Example in plants
Example in animals
Level of
organisation
(smallest to
biggest)
Cells
Definition
A group of cells with a similar
structure and function, which all
work together to do a particular
job.
Example in plants
Example in animals
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
Leaves
Glandular cells
Photosynthetic system
Stomach lining
Organ system
Organism
The smallest unit of an organism
An individual plant, animal, or
single-celled organism.
Task 3
Apply your knowledge of cell organisation
to the human digestive system.
Support: Additional science text books,
phones.
Cells to organism (animals)
specialised cell
tissue
organ
system
muscle cell
muscle
tissue
heart
circulatory
system
organism
circulatory
system makes up
part of the
human body
Task 2
You will have 5 minutes to learn about
each type of tissue in the human body.
You should
1) Read and highlight the information
2) Stick in each sheet in your book
3) Answer the questions on your book.
Task: read the information and answer the questions in your books
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. There are three types: smooth (involuntary in visceral organs), skeletal
(voluntary, control movement) and cardiac (found in the heart, involuntary).
Questions
1. What does specialised mean?
2.
What the two things that muscle tissue can do?
3. Name the 3 types of muscle and give the function of each.
Extension: Name and describe the function of a muscle with contracts voluntarily and one
that contracts involuntarily.
B: Glandular tissue
Glandular tissue produces and releases hormones and
enzymes. This tissue is rich in capillaries. Each cell must contact
a capillary directly in order to deliver the substance it produces
to the rest of the body.
Questions
1. Give one example of where glandular tissue is found in the body.
2. Describe the function of glandular tissue?
3. Explain why the glandular tissue be close to capillaries.
Extension: Explain why would the human digestive system need
glandular tissue?
C: Epithelial Tissue
Epithelial tissue covers the external and internal surfaces of
the body where it forms a protective barrier or acts as an
exchange surface. Epithelial tissue that occurs on surfaces
on the interior of the body is known as endothelium.
It is made up of cells closely packed in one or more layers..
Questions
1. Where in the body would you find epithelial tissue?
2. Describe the function of epithelial tissue?
3. Explain how are epithelial tissues specialised?
Extension: describe the key features of exchange surfaces
TASK
1. Label the diagram
2. Can you give the function of
this Organ?
Extension: For each can you
write what Tissues you would
expect to find In this organ ?
We have lots of different Organ
Systems. Can you name any?
Together all of these organ systems make an
organism like you!
Objective: To understand what happens when cells work together.
Paired Reading
Label yourself A and B in pairs. A will read on
of the sheets. B will read the other. You have 3
minutes of silent reading. Complete the flow
chart at the bottom of the sheet.
Now that you’re an expert on that organ system
you have 2 minutes to teach the other person
about that system. A’s have 2 minutes first, then
B’s will go
Plenary: Size and scale in relation to cells, tissues,
organs and organ systems...
List the following structures, starting with the
smallest