Cells
Describe the building blocks of living organisms
Reference SW9 Pg 104-105
Cells are the basic units of life.
All the functions of Living Organisms (that you learned in the previous section) happen because the cells inside them are alive and functional.
Although all cells share some features in common, there is in fact no such thing as a “general” cell.
Each is specialised to a particular role in the whole organism. e.g. nerve cells are long and thin to carry nerve messages around the body (a bit like electrical wiring) and muscle cells can contract and relax so you can move.
Task One
Visit www.cellsalive.com and click on the interactive “How big is a cell” exercise.
Look at some pictures of specialised cells on this site.
Then search images of many different kinds of plant and animal cells. Paste and label them here
X
Save some in google drive, your edmodo group or similar so that you can share them
Reference SW9 Pg 108.
Cells are made of smaller parts. Just as you are made of the organs inside you, the tiny cell structures that make up the cell are called organelles.
Below are images of the organelles that all cells have in common.
Plant Cells have some extra ones that Animal cells lack.
Reference SW9 Pg 104-105
Cells are the basic units of life.
All the functions of Living Organisms (that you learned in the previous section) happen because the cells inside them are alive and functional.
Although all cells share some features in common, there is in fact no such thing as a “general” cell.
Each is specialised to a particular role in the whole organism. e.g. nerve cells are long and thin to carry nerve messages around the body (a bit like electrical wiring) and muscle cells can contract and relax so you can move.
Task One
Visit www.cellsalive.com and click on the interactive “How big is a cell” exercise.
Look at some pictures of specialised cells on this site.
Then search images of many different kinds of plant and animal cells. Paste and label them here
X
Save some in google drive, your edmodo group or similar so that you can share them
Reference SW9 Pg 108.
Cells are made of smaller parts. Just as you are made of the organs inside you, the tiny cell structures that make up the cell are called organelles.
Below are images of the organelles that all cells have in common.
Plant Cells have some extra ones that Animal cells lack.
List organelles that a Plant cell has that an Animal cell do not have:
X
Task Two
Complete SciPad page116
Explain the function of basic cell structures
Distinguish between plant and animal cells
Function of organelles found in animal cells AND plant cells
Nucleus: X
Cytoplasm: X
Cell membrane: X
Plant cells also have organelles found ONLY in Plant cells:
Cell wall: X
Chloroplasts: X
Permanent vacuole: X
Task Three
Create a colourful poster - using your devices – of a plant cell.
Annotate each label of an organelle with a brief outline of its function. (Use the above functions as a guide only. There is more explanation in your textbook).
Identify parts of a microscope
Prepare microscope slides
Observe cells through a microscope
Reference SW9 Pg 106-107
Task Four
Complete Scipad pages 118-121
Take photos of each step of your slide preparation and insert here
X
Cells are organised in all living organisms.
Describe organisation of cells into tissues, organs, organ systems and organisms
Task Five
Read the information in your text book page 110.
Construct a visual display of images of muscle cells, muscle tissue, muscles and musculoskeletal organs that make up the movement system in a
human.
Explain the growth of an organism by cell division
Cells must be replaced after injury or to make new cells for growth. Each cell has the ability to replicate its organelles and then form TWO
new identical cells, in a process called MITOSIS.
Task Six
Watch the mitosis animation on www.cellsalive.com
Where, in a plant or animal, would you expect to find many cells undergoing Mitosis at the same time?
X
Describe how cells are involved in reproduction
Reference SW9 Pg 112-116
Some organisms are made of only one cell – unicellular. These organisms use Mitosis to reproduce identical copies of themselves.
This is called ASEXUAL REPRODUCTION
Paste in a picture showing this happening in a unicellular organism
X
Task Seven
Go to http://www.sciencekids.co.nz/videos/biology/bacteria.html
Plants such as strawberry plants also use reproduce asexually - cells in the stems undergo Mitosis and grow sideways stems (runners) which can grow into new plants. As with all asexual reproduction the new plants are identical to the single parent plant.
SEXUAL REPRODUCTION
This involves specialised male and female cells: sperm and egg in animals and pollen and ova in plants. The purpose is to produce one cell which has DNA from both of the original parent cells, so that this new cell can then grow into a new organism that is different from its parents.
X
Task Two
Complete SciPad page116
Explain the function of basic cell structures
Distinguish between plant and animal cells
Function of organelles found in animal cells AND plant cells
Nucleus: X
Cytoplasm: X
Cell membrane: X
Plant cells also have organelles found ONLY in Plant cells:
Cell wall: X
Chloroplasts: X
Permanent vacuole: X
Task Three
Create a colourful poster - using your devices – of a plant cell.
Annotate each label of an organelle with a brief outline of its function. (Use the above functions as a guide only. There is more explanation in your textbook).
Identify parts of a microscope
Prepare microscope slides
Observe cells through a microscope
Reference SW9 Pg 106-107
Task Four
Complete Scipad pages 118-121
Take photos of each step of your slide preparation and insert here
X
Cells are organised in all living organisms.
Describe organisation of cells into tissues, organs, organ systems and organisms
Task Five
Read the information in your text book page 110.
Construct a visual display of images of muscle cells, muscle tissue, muscles and musculoskeletal organs that make up the movement system in a
human.
Explain the growth of an organism by cell division
Cells must be replaced after injury or to make new cells for growth. Each cell has the ability to replicate its organelles and then form TWO
new identical cells, in a process called MITOSIS.
Task Six
Watch the mitosis animation on www.cellsalive.com
Where, in a plant or animal, would you expect to find many cells undergoing Mitosis at the same time?
X
Describe how cells are involved in reproduction
Reference SW9 Pg 112-116
Some organisms are made of only one cell – unicellular. These organisms use Mitosis to reproduce identical copies of themselves.
This is called ASEXUAL REPRODUCTION
Paste in a picture showing this happening in a unicellular organism
X
Task Seven
Go to http://www.sciencekids.co.nz/videos/biology/bacteria.html
Plants such as strawberry plants also use reproduce asexually - cells in the stems undergo Mitosis and grow sideways stems (runners) which can grow into new plants. As with all asexual reproduction the new plants are identical to the single parent plant.
SEXUAL REPRODUCTION
This involves specialised male and female cells: sperm and egg in animals and pollen and ova in plants. The purpose is to produce one cell which has DNA from both of the original parent cells, so that this new cell can then grow into a new organism that is different from its parents.