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Plant Structures Plant Science.

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Presentation on theme: "Plant Structures Plant Science."— Presentation transcript:

1 Plant Structures Plant Science

2 Major Plant Parts roots stems leaves buds flowers

3 Functions of Roots anchor the plant absorb water and minerals
store manufactured food

4 Parts of the Root primary root: the single main root
secondary roots: small branches that form off the main root root hairs: tiny roots that increase the absorption surface area root cap: protects the growing tip of roots

5 Root System Types adventitous roots: grow from the stem or leaf of a plant (ex. corn stalks have prop roots) tap root system: root system with one thick main root (examples: pine trees, carrots, dandilions) fibrous root system: root system with many small main roots (examples: grasses, soybeans, impatiens)

6 Functions of Stems support the leaves, flowers, and fruit
conduct water, minerals, and food store food and water produce new stem tissues

7 Parts of the Stem 2 types of conductive tissues
xylem: transports water and minerals from the roots phloem: transports food from the leaves cambium: the layer of dividing cells that creates the xylem and phloem becomes growth rings in trees

8 Vascular Bundles made up of the xylem and pholem
in monocots, they are scattered in dicots, they are in a circle (or a ring)

9 Buds contain undeveloped plant structures
bud scales: protect and cover the bud terminal bud: a large bud at the tip of a stem lateral buds: grow along the side of stems apical meristem: primary growing point of the stem

10 Leaves produce food for the plant through photosyntheis
epidermis: a protective layer of cells on the leaf cuticle: a waxy coating that prevents water loss stomata: pore-like openings on the underside of the leaf that allow gas exchange guard cells: control the opening and closing of the stomata veins: carry nutrients and products of photosynthesis (contain the xylem and phloem)

11 Mesophyll layer of the leaf where photosynthesis takes place
made up of two layers: palisade layer spongy layer

12 Function of Flowers reproduction (to produce seeds)
sepals: protect the unopened flower calyx: the collection of sepals petals: attract pollinators (insects and birds)

13 Male Part of the Flower as a whole, known as the stamen
made up of two structures: filament: supports the anther anther: produces pollen pollen: contains the male sex cells pollination has to occur for seeds to develop

14 Female Part of the Flower
as a whole, known as the pistil made up of three parts: stigma: sticky surface for pollen to land on style: supports the stigma ovary: contains the female sex cells fruit: contains the seeds; develops from the ovary

15 Types of Flowers complete flowers: have sepals, petals, stamen, and pistil incomplete flowers: are lacking one of the four main parts

16 Monoecious vs. Dioecious
monoecious plants: have male and female flowers on the same plant dioecious plants: have male and female flowers on separate plants imperfect flowers: do not have male and female parts on the same flower

17 Thank you for learning with us!

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