1. Plants!!!

2. Main Understandings
describe how the surface area to volume ratio affects cell size and shape
explain why, when a single-celled organism reaches a certain size, it requires a multicellular level of organization
Explain that plants need specialized cells tissues and systems
Describe the specialized parts of the leaf and what they do: epidermis including guard cells, palisade tissue cells, spongy tissue cells
Understand how the parts of the leaf and phloem and xylem vascular tissue cells help photosynthesis

3. What you want to learn: Anemia
Less red blood cells or less of the protein hemoglobin
Both are essential for transporting oxygen
As a result, can feel weak, tired, or lightheaded
Depending on your type of anemia your diet can help
Iron: spinach, tofu, lentils, prune juice
Vitamin B12: meats, egg, dairy
Folic Acid: bananas, bread, spinach, pasta, beans

4. Surface Area to Volume Ratio
Cells need a high surface area to exchange nutrients with its surroundings
Surface Area : Volume ratio shows how efficient cells are to perform diffusion
As cells increase in size, they have a higher volume and less surface area for their volume. Therefore, their SA:V ratio is smaller, and they are less efficient at diffusion.
When they get too big, they must divide
Multicellular organisms have developed different mechanisms to transport nutrients and water.

5. How Multicellular Plants Transport Nutrients and Water
Plants have special transport tissues, called vascular bundles.
There are two types
1) Xylem transports water and minerals from the roots up towards the leaf for photosynthesis
2) Phloem transports sugars and other molecules all around the plant.

6. How We Color Flowers
You may have noticed when you go to buy flowers for a special someone, that there are a wide range of cool bright colors.
These unnatural colors are created using flower’s xylem system.
You can put dye into the water and then it will travel into the petals changing the color.

7. How We Get Maple Syrup We get the sweet syrup from the maple tree
Originally from the Aboriginals, we tap the tree to access the sweet sap

8. Parts of the Plant Leaf Video
What do the palisade tissue cells do?
What do the guard cells do?
What is the role of the stomata?
What do the spongy cells do within the plant?
What does the cuticle do?

9. Summary Label your diagram as we go Waxy coating which seals the leaf
Contains chlorophyll for photosynthesis
Lets CO2 in
Allows for gas to move through
Surrounded by Guard cells

10. Questions?