The Plant Body and Tisssues
As for all animals, your body is made of four types of tissue: epidermal, muscle, nerve, and connective tissues. Plants, too, are built of tissues, but not surprisingly, their very different lifestyles derive from different kinds of tissues. All three types of plant cells are found in most plant tissues. Three major types of plant tissues are dermal, ground, and vascular tissues. Please read the chapter on tissues and summarize it on our blog.
Blog Alert - Enter what would be your guiding question? What would you like to know about plant tissues, are there anything you would like to study, what are you curious about? Click on the button below to post your comments to our blog. Blog post is worth 10 achievements.
Level 2 - The Guiding Question- How do fluids and nutrients make it up to the top of a tree that is 379 ft.?
To view the chapter on plant tissues please click on the button below.
Level 2 - Investigation: Lab on Transpiration
Vascular plants are known as tracheophytes, which literally means “tube plants.” The earliest vascular plants quickly came to dominate terrestrial ecosystems. Why were they so successful? It was mainly because of their tube-like vascular tissues.The vascular tissues for which these plants are named are specialized to transport fluid. They consist of long, narrow cells arranged end-to-end, forming tubes. There are two different types of vascular tissues, called xylem and phloem.,Xylem is vascular tissue that transports water and dissolved minerals from roots to stems and leaves. This type of tissue consists of dead cells that lack end walls between adjacent cells. The side walls are thick and reinforced with lignin, which makes them stiff and water proof. Phloem is vascular tissue that transports food (sugar dissolved in water) from photosynthetic cells to other parts of the plant for growth or storage. This type of tissue consists of living cells that are separated by end walls with tiny perforations, or holes. Click on the button "Lab directions" to see how to the conduct the lab. Lab is worth 20 achievements.
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Transpiration Lab Set up
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Transpiration Lab Data Entry
Level 2- Investigation: Leaf Tissues
Within the epidermis, thousands of pairs of bean-shaped schlerenchymal guard cells swell and shrink by osmosis to open and close stomata, tiny pores which control the exchange of oxygen and carbon dioxide gases and the release of water vapor. Click on one of the two buttons below to get the instructions for the lab please follow the lab as written you can get all your supplies from your instructor and turn in the lab write up online or by email. Lab is worth 20 achievements.
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Level 2- Investigation:Leaf anatomy
The leaf is the
primary photosynthetic organ of the plant. It consists of a flattened portion,
called the blade, that is attached to the plant by a structure called the
petiole. Sometimes leaves are divided into two or more sections called
leaflets. Leaves with a single undivided blade are called simple, those with
two or more leaflets are called compound. Click on one of the two buttons below to get the instructions for the lab please follow the lab as written you can get all your supplies from your instructor and turn in the lab write up online or by email. Lab is worth 20 achievements.
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BLog Alert Watch the VDO on the right and then click on the button below to post your blog comments and discuss with your classmates what are you observing and what is their role in helping plants move water and nutrients. |
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Level 2 - Video Vascular tissue runs through the ground tissue inside a plant. Your body was able to grow from a single cell to perhaps 100 trillion cells because, 21 days after fertilization, a tiny heart began to pump blood throughout your tiny self – and it hasn’t stopped since. The blood it pumps carries water, oxygen and nutrients to each one of your trillions of cells, and removes CO2 and other wastes. Of course plants don’t have hearts, but they do have vessels that transport water, minerals, and nutrients through the plant. These vessels are the vascular tissue, and consist ofxylem and phloem.
Level 2 - Video Plants are built of tissues. All four types of plants cell are found in most plant tissues, Four major types of plant tissues are dermal, ground, meristematic and vascular tissues. After viewing this VDO write a detailed explanation of how water and nutrients cycle through plants use as many tissues, and processes as we have discussed. Enter your essay in the form below. This assignment is worth 20 achievements.
Level 2- Elaborate Plant Tissue microscope lab. obtain three prepared microscope slides that contain the following plant specimens: stems,leaves and roots. Observe the size and shape of each cell it will give you clues to the type of tissues they are such as parenchyma, collenchyma or sclerenchyma. To know what to look for either read the online chapter on our text at the start of this page or do an internet image search or watch the VDO on "Plant Tissue located in this website. Once you have located your image in the microscope either draw what you see watch you see being careful to make detailed drawings with color and label them with the specimen name as ell as he type or types of tissues you see click on the link below to download and print the lab. 20 achievements
planttissuemicroscopelab.docx | |
File Size: | 78 kb |
File Type: | docx |
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Level 2- Review Use the flash cards to test yourself before you take the unit test.
Level 2- Review View the following VDO and submit your answers to the questions. 20 achievements.
The leaf is the primary photosynthetic organ of the plant. It consists of a flattened portion, called the blade, that is attached to the plant by a structure called the petiole. Sometimes leaves are divided into two or more sections called leaflets. Leaves with a single undivided blade are called simple, those with two or more leaflets are called compound.
The outer surface of the leaf has a thin waxy covering called the cuticle (A), this layer's primary function is to prevent water loss within the leaf. (Plants that leave entirely within water do not have a cuticle). Directly underneath the cuticle is a layer of cells called the epidermis (B). The vascular tissue, xylem and phloem are found within the veins of the leaf. Veins are actually extensions that run from to tips of the roots all the way up to the edges of the leaves. The outer layer of the vein is made of cells called bundle sheath cells (E), and they create a circle around the xylem and the phloem. On the picture, xylem is the upper layer of cells (G) and is shaded a little lighter than the lower layer of cells - phloem (H). Recall that xylem transports water and phloem transports sugar (food).
Within the leaf, there is a layer of cells called the mesophyll. The word mesophyll is greek and means "middle" (meso) "leaf" (phyllon). Mesophyll can then be divided into two layers, the palisade layer (D) and the spongy layer (F). Palisade cells are more column-like, and lie just under the epidermis, the spongy cells are more loosely packed and lie between the palisade layer and the lower epidermis. The air spaces between the spongy cells allow for gas exchange. Mesophyll cells (both palisade and spongy) are packed with chloroplasts, and this is where photosynthesis actually occurs.
The outer surface of the leaf has a thin waxy covering called the cuticle (A), this layer's primary function is to prevent water loss within the leaf. (Plants that leave entirely within water do not have a cuticle). Directly underneath the cuticle is a layer of cells called the epidermis (B). The vascular tissue, xylem and phloem are found within the veins of the leaf. Veins are actually extensions that run from to tips of the roots all the way up to the edges of the leaves. The outer layer of the vein is made of cells called bundle sheath cells (E), and they create a circle around the xylem and the phloem. On the picture, xylem is the upper layer of cells (G) and is shaded a little lighter than the lower layer of cells - phloem (H). Recall that xylem transports water and phloem transports sugar (food).
Within the leaf, there is a layer of cells called the mesophyll. The word mesophyll is greek and means "middle" (meso) "leaf" (phyllon). Mesophyll can then be divided into two layers, the palisade layer (D) and the spongy layer (F). Palisade cells are more column-like, and lie just under the epidermis, the spongy cells are more loosely packed and lie between the palisade layer and the lower epidermis. The air spaces between the spongy cells allow for gas exchange. Mesophyll cells (both palisade and spongy) are packed with chloroplasts, and this is where photosynthesis actually occurs.
Level 2- Summary After you have reviewed the above material and have talked to the instructor please take the unit test. 30 achievements.
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