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Plant Organs and Systems

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Presentation on theme: "Plant Organs and Systems"— Presentation transcript:

1 Plant Organs and Systems

2 Levels of organization for plants and animals
Cells Tissues Organs Organ Systems

3 Plant organization Plant cell (bark cell) Plant tissue (bark tissue)
Plant organ (leaves, stems, roots) Plant system (work together to make, transport, and store food)

4 Plant Organs Leaf: function: make food, give shape, keep water inside plant cuticle Vascular bundle (xylem & phloem) epidermis palisade mesophyll spongy mesophyll lower epidermis stomata guard cell

5 Leaf Parts: Cuticle: waxy layer on outside surface, prevents water loss Epidermis: outer layer, protection Mesophyll: photosynthetic tissue, made up of 2 layers Stomata: openings on leaf surface for exchange of gases Guard cell: controls the size of the stomata Xylem: carries water from roots to leaves Phloem: carries food from leaves to other parts of the plant

6 Plant Organs Stems: functions: hold the leaves up, moves water, food, and other materials.

7 Plant Organs Roots: functions: take in water and other materials from soil, hold plant in soil, store extra food

8 Plant Organs Flowers: Non reproductive parts = petal and sepal
Reproductive parts = stamen and pistil Stamen – male reproductive part contains the anther which makes the pollen containing sperm Pistil – female reproductive part contains the ovary at the bottom which holds ovule that makes the eggs

9 In plants, sexual reproduction takes place in the flower.

10 Flower Structure

11 Female Parts Pistil = the female structure of the flower
Ovary = contains ovules where eggs are formed. Stigma = receives the pollen during fertilization. Style = area between the stigma and ovary.

12 Male Parts Stamen = the male reproductive structure of a flower
Anther = where pollen is produced. Filament = holds up the anther Pollen = male gamete Pollen shape is different for each plant

13 Other Flower Structures
Petals = usually colorful, leaf-like structures surrounding the male and female reproductive organs. Sepals = found below the petals and encase the rest of the flower when it is in bud and not yet opened

14 Plant Processes Transpiration: the evaporation of water from the stomata of leaves Absorption: uptake of water from the roots Response to stimulus: plants respond to external stimuli from a specific direction Ex: tropisms

15 Tropisms: “trop” = turn, change “ism” = thing
Phototropism = the tendency of a plant to move towards a light source Hydrotropism = the tendency of a plant to grow with the roots reaching toward water Geotropism = the tendency of a plant to grow with the roots downward and with the leafy parts upward

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