introduction to plants packet #15 chapters #20 & 21 10/25/2015 1
TRANSCRIPT
Introduction to Plants
Packet #15Chapters #20 & 21
04/20/23
1
Introduction I
Plants help provide the foundation for all living organisms on planet earth.
Plants are responsible for capturing energy from the sun, and, ultimately that energy is passed along to animals—allowing them to survive.
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Specialized Plant Cells
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Specialized Plant Cells
Parenchyma cells Aids with storage and
movement of materials in plants
Sclerenchyma cells Dead cells that usually
provide strength and support.
Collenchyma cells Capable of stretching
and provide mechanical support
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Plant Tissue
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Plant Tissue
Three Types of Tissue Dermal Tissue
Plant’s protective covering in contact with the environment
Facilitates water and ion uptake in roots
Regulates gas exchange in leaves and stems
Vascular Tissue Xylem & phloem Conducts water and solutes
between organs Provides structural support
Ground Tissue Packing and supportive
tissue Food manufacturing and
storage
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Plant Organs
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Introduction
There are four major organs of a plant Flower* (Not all
plants) Stem Root Leaf
Flower
The flower contains the organs of plant sexual reproduction
It attracts insects needed to carry the pollen between plants to allow pollination
It's important for reproduction of flowering plants.
Stem
The stem is the organ which holds the leaves upright in the air and facing the light
It carries water and minerals to the leaves, and food around the plant
The stem is important for nutrition, excretion and growth
Roots
The root is the organ which provides anchorage for the plant so that it does not blow away or fall over
With root hairs, the root provides a big surface area to help take in water and minerals from the soil – both of which are essential for photosynthesis
The root is therefore important for nutrition
Leaf
Site of photosynthesis
Responsible for capturing light energy and transforming it into chemical energy.
More details on the structure of the leaf in Packet #16.
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Organ Systems of Plants
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Organ Systems I
There are two major organ systems in plants Shoot system
Stems Leaves
Root system Roots Trichomes
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Types of Plants {Organisms}
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Type of Plants {Organisms} I
Seedless Non-Vascular Plants Bryophytes
Mosses Hornworts Liverworts
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Type of Plants {Organisms} II
Seedless Vascular Plants Ferns Whisk ferns
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Type of Plants {Organisms} III
Gymnosperms Pine Cones
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Type of Plants {Organisms} IV
Angiosperms Flowering Plants
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Review
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