Good Things We Get From Plants 1. Oxygen for humans and animals to breath 2. Fuel for heating and transportation 3. Building materials 4. Medicines 5. Food for human and animal nutrition 6. Fabric for clothing and other purposes 7. Paper 8. Cover against wind and water 9. Habitat for animals 10. Aesthetics

Basic Parts of the Plant Roots Stems Leaves Flowers

2. Absorb water and minerals 3. Translocate water and minerals to stem Roots 1. Anchor Plant 2. Absorb water and minerals 3. Translocate water and minerals to stem 4. Store Food

1. Translocate water, minerals and food to the leaves Stems 1. Translocate water, minerals and food to the leaves 2. Support the leaves and display them to light 3. Store Food

1. Make food through photosynthesis 2. Provide site of gas exchange Leaves 1. Make food through photosynthesis 2. Provide site of gas exchange 3. Store food

1. Contain organs for specialized sexual production Flowers 1. Contain organs for specialized sexual production 2. Produce seeds and fruit

Different type of Roots A. Tap Root Continuation of the primary root Ideal for anchorage Penetration is greater for water Storage area for food made by photosynthesis

Different type of Roots B. Fibrous Roots Many finely branched secondary roots Shallow roots cover a large area More effective absorption of water and minerals Roots hold the soil to prevent erosion

Different type of Roots C. Aerial roots Clinging air roots Short roots that grow horizontally from the stems Roots that fasten the plant to a support Absorptive air roots

Different type of Roots Adventitious Roots Develop in places other than nodes Can form on cuttings and rhizomes

Roots Root hairs: Tiny one celled hair like extensions of the epidermal cells located near the tips of the roots where vascular tissues have formed. Increase surface area Absorb water and minerals from soil

Principal Tissues of the Leaf Epidermis Cuticle Waxy substance covers the leaves and stems Waterproof layer that keeps water in plants

Principal Tissues of the Leaf Epidermis (cont) Stomata Openings in the epidermis mainly located on underside of leaves Exchange of gases

Principal Tissues of the Leaf Epidermis (cont) Guard Cells Two cells located on each side of stomata Open and closes stomata

Principal Tissues of the Leaf Mesophyll layer Palisade mesophyll Primary site of photosynthesis Spongy mesophyll Contains air and chloroplasts Site of photosynthesis and gas exchange

Principal Tissues of the Leaf Veins or vascular bundles In spongy mesophyll Phloem tissues conduct food from photosynthesis to rest of plant Xylem tissues conduct water and minerals up to cells in leaves and stems

Parts of the Flower Sepals Outer covering of the flower bud Protects the stamens and pistils when flower is in bud stage

Parts of the Flower Petals Brightly colored Protects stamen and pistills Attracts pollinating insects

Parts of the Flower Stamens Male Reproductive part Anther-produces pollen Filament-supports the anther

Parts of the Flower Pistil Female reproductive part Ovary Enlarged portion at base of pistill Produces ovules which develop into seeds Stigma Holds the pollen grains

Parts of the Flower Style Connects the stigma with ovary Supports the stigma so that it can be pollinated

Complete and Incomplete Flowers Complete: have all four main parts Sepals Petals Stamens Pistils