Copy this table into your notes. - whssbiozone tissue organ organ system There are three main types...
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Plant systems April 05, 2012 Specialized plant tissues perform specific functions the way organs do in animals. Plant Systems Just like in animals, plants are organized: cell tissue organ organ system There are three main types of cells in plants: Parenchyma Collenchyma Sclerenchyma
Transcript of Copy this table into your notes. - whssbiozone tissue organ organ system There are three main types...
Plant systems April 05, 2012
Specialized plant tissues perform specific functions the way organs do in animals.
Plant SystemsJust like in animals, plants are organized:cell tissue organ organ system
There are three main types of cells in plants:Parenchyma Collenchyma Sclerenchyma
Plant systems April 05, 2012
Copy this table into your notes.Use page 388 389 of your BiologySource 11 text to complete the table.
Parenchyma Collenchyma SclerenchymaTissue:
Description:
Sketch:
Example:
• Thin cell walls and large vacuoles used for food storage• Used for cellular resp. and photosynthesis
• Unevenly thick walls• Grow in strands/ cylinders• Provide support for the plant
• Thick, even walls• Specialized for support
Fleshy parts of fruits
"strings" in celery
Pear skin and grains in its flesh
Plant systems April 05, 2012
Roots2 main types:Tap Roots:
Fibrous Roots:
Plant Organs:
when the plant develops one long thick root with few small branches
ex: dandelions, carrots
when the plant has many roots, all similar in size
ex; grains, grasses, onions
Plant systems April 05, 2012
There are several tissues found in roots:
Epidermis:
Cortex:
Vascular Cylinder:
Root Hairs
Root Cross Section
vascular cylinder
Ground tissue/
the "skin" or outermost layerone layer of cells thickprotections, absorbs waterspecialized cells produce root hairs (increase surface area for absorbtion)
just below the epidermismost of the root is cortexused for storage of starchtransports water and minerals from the epidermis to the centre of the root (osmosis)endodermis is the inside waxy layer
contains xylem (for water transport)and phloem (minerals, sugar)these cells work together as vessels to move fluids in the plant
Plant systems April 05, 2012
Stems2 main types:
Herbaceous:
Woody:
green, soft tissuedo not survive wintercontain many vascular bundles (xylem and phloem)
tough hard tissuesurvives wintertissue organized in layers, older tissue in the centreeach year new xylem and phloem tissue are formed by the vascular cambium (near the outside of the stem) to form the "rings" of the tree
Plant systems April 05, 2012
LeavesContain the tissues and organelles required for photosynthesis. Organized into layers:
Cuticle:
Epidermis:
Mesophyll:2 layers: palisade layer
spongy layer
veins
waxy substance produced by epidermis for protection and waterproofing
outer layer meant to protect inner tissuescontains openings called stomata, controlled by guard cells that open and close with turgor pressure
densely packed with more chloroplastsloosely spaces with large air pockets, so air can contact cells for gas exchangevascular tissue brings water and nutrients from roots
Plant systems April 05, 2012
Plant systems April 05, 2012
Monocots vs. DicotsStructure Monocots Dicots
Cotyledon
Leaf Veins
Vascular bundles in stems
Root system
Floral parts
(food storage in seeds of flowering plants)
(xylem and phloem)
one cotyledon two cotyledons
parallel veins netlike or branched veins
complex(scattered arrangement)
arranged in a ring
fibrous roots tap root system
usually in multiples of 3
usually in multiples of 4 or 5
Use page 390 to complete the chart
