Presentation on theme: "Plant Unit: Roots, Stems, and Leaves. What are Xylem and Phloem? ► Transport System ► Similar to our veins and arteries ► Xylem – moves water from roots."— Presentation transcript:
Plant Unit: Roots, Stems, and Leaves
What are Xylem and Phloem? ► Transport System ► Similar to our veins and arteries ► Xylem – moves water from roots to leaves ► Phloem – Transport nutrients and products of Photosynthesis throughout the plant.
Xylem ► Move water and other minerals from roots to all other parts of plant.
Phloem ► Moves the products of photosynthesis (sugar) from the leaf throughout the plant.
Roots: Taproots and Fibrous ► Designed to anchor plant to ground. ► Absorbs water, oxygen, and other dissolved minerals from soil. ► Stores some of the materials produced by the plant.
Taproots ► Described as central fleshy root ► Taproot = main root of a plant.
Fibrous Root ► Many fibrous roots are present at the same time. All branching from main plant. ► Grasses are an example of a fibrous root system.
Root Tissues ► Roots are made of different tissues. ► Epidermis ► Cortex ► Vascular Tissues
Cross Sections Of Roots Ranunculus 40 X Ranunculus 100 X
Stems: ► Hold Leaves up in Sunlight ► Transport water and minerals between Leaves and Roots ► Stem Parts: Epidermis Cortex Vascular Tissue
Stems: Woody ► Three major zones. ► Xylem ► Bark ► Vascular Cambium
Cross Sections of Stems ► Alfalfa 100 X Corn 100 X
Flower Parts ► Reproduction (sexual) takes place in the flower. ► Stamen=male reproductive system ► Pistil=female reproductive system ► Petals=color to attract pollinators ► Sepals=outer part of flower; provides protection to the ovary/ovule.
Stamen ► Consists of: Anther=where the pollen is made and stored. Pollen=contains sperm cells. Filament=supports the anther
Pistil ► Consists of: Stigma=sticky surface for pollen to land on Style=connects stigma to ovary Ovary=contains ovules with egg—becomes the fruit we eat! Ovule=contains ONE egg—will become the seed!