Plants Review Subtitle. Flower Anatomy Parts of the Flower Sepals –Covers flower bud. –Protects the stamens and pistils when flower is in bud stage.

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Presentation transcript:

Plants Review Subtitle

Flower Anatomy

Parts of the Flower Sepals –Covers flower bud. –Protects the stamens and pistils when flower is in bud stage. –Collectively known as the calyx.

Parts of the Flower Petals –Brightly colored –Protects stamen & pistils. –Attracts pollinating insects. –Collectively called the corolla.

Parts of the Flower ( Stamen ) Male reproductive part – Anther – Produces pollen – Filament – Supports anther

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

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

Seeds –Grow inside the fruit –Inside the seed 1. Embryo 2. Food supply 3. Seed Coat

III. Roots Functions –Anchor the plant –Absorb water & minerals –Store food –Propagate or reproduce some plants

External Parts of Roots Root Cap –Indicates growth of new cells.

External Parts of Roots Root Hairs –Tiny one celled hair- like extensions of the epidermal cells located near the tips of roots. –Increase surface area. –Absorb water & minerals.

Internal Parts of Roots Much like those of stems with phloem, cambium and xylem layers. Phloem –The outer layer. – Carries food down the plant.

Internal Parts of Roots Xylem- dead –The inner layer. – Carries water & minerals up to the stem.

II. Stems Functions –Movement of materials –Water & minerals from roots to leaves –Manufactured food from leaves to roots –Support leaves & reproductive structures –Food storage

External Stem Structure Lenticels –Breathing pores. Bud Scale Scars –Show where terminal buds Have been located. Leaf Scars –Show where leaves were attached.

External Stem Structure Terminal Bud –Bud on the end of the stem. Axillary Lateral Bud –Bud on the side of the stem.

Internal Stem Structure Xylem –The tissue that transports water & nutrients up from roots to stems & leaves. Phloem –Tissue that transports food down from leaves to roots. Cambium – Thin, green, actively growing tissue between bark & wood and produces all new stems cells.

Internal Stem Structure Bark –Old, inactive phloem. Heartwood –Old, inactive xylem. Sapwood –New, active xylem.

Heartwood and sapwood Heartwood provides structural support but no longer transports water Sapwood transports water Bark

I. Leaves Functions –Make food through photosynthesis –Site of gas exchange –Respiration –Photosynthesis –Store food

Tissues of the Leaf (Epidermis) Cuticle –Waxy substance that covers the leaves & stems –Waterproof layer that keeps water in plants

Tissues of the Leaf (Epidermis) Stomata –Openings epidermis under leaves –Exchange of gases

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

Tissues of the Leaf (Mesophyll Layer) Palisade mesophyll –Primary site of photosynthesis Spongy mesophyll –Contains air & chloroplasts –Site of photosynthesis and gas exchange

Tissues of the Leaf Vascular Bundles –Called veins –In spongy mesophyll –Phloem moves food from leaf to the rest of the plant –Xylem moves water & minerals up to leaves from roots

Tissues of the Leaf

External Parts of the Leaf Petiole –Leaf stalk that connects the leaf to the stem. Blade –The large, flat part of a leaf. Midrib –The large center vein.