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What Is The Hardest Thing For You About Living Green?

admin — Wed, 09 Dec 2009 18:56:11 +0000

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Green Living

admin — Sat, 05 Dec 2009 16:02:18 +0000

Product Description
The Whole Earth Catalog for the next generation. Experts suggest that by 2005, 40 percent of American homes will buy organic, yet a large majority have only a limited knowledge of how to actually make informed, green choices. Green Living, from the editors of E/The Environmental Magazine offers a thorough, step-by-step plan for every aspect of your life, from the laundry room to the kitchen:

Maintaining a healthy home
Going organic and avoiding g… More >>

Green Living

Why Does A Living Organism Have Different Types Of Cells?

admin — Sat, 05 Dec 2009 16:02:16 +0000

Your body is made of about 10 trillion cells. The largest human cells are about the diameter of a human hair, but most human cells are smaller — perhaps one-tenth of the diameter of a human hair.
Run your fingers through your hair now and look at a single strand. It is not very thick — maybe 100 microns in diameter (a micron is a millionth of a meter, so 100 microns is a tenth of a millimeter). A typical human cell might be one-tenth of the diameter of your hair (10 microns). Look down at your little toe — it might represent 2 or 3 billion cells or so, depending on how big you are. Imagine a whole house filled with baby peas. If the house is your little toe, the peas are the cells. That’s a lot of cells!
At a microscopic level, we are all composed of cells. Look in a mirror — what you see is about 10 trillion cells divided into about 200 different types of cells. Our muscles are made of muscle cells, our livers of liver cells, and there are even very specialized types of cells that make the enamel for our teeth or the clear lenses in our eyes!
If you want to understand how your body works, you need to understand cells. Everything from reproduction to infections to repairing a broken bone happens down at the cellular level. If you want to understand new frontiers like biotechnology and genetic engineering, you need to understand cells as well.
Quick Review
All life is made of cells.
Most scientists divide life into 5 separate kingdoms (Plants, Animals, Protists, Moneran, & Fungi) based on their similarities and differences.
Some life forms are very simple and made of only one cell (Moneran, Protists, some Fungi).
Other life forms (Animals, Plants, some Fungi) are made of many cells that work together
In the last lesson we saw what most cells have in common. When you hear the word cells or study cells you can put a picture in your mind of what a cell looks like. You are familiar with the basic parts of all cells, like a cell membrane, the nucleus, and the mitochondria.
In this lesson, our purpose is to see how cells are different. We call this cell differentiation. In the nucleus of each cell you will find small structures called chromosomes. These hold the plan, like a set of blueprints, which decides what a cell will look like and what its job will be.
A maple tree is an example of a complex organism. It has many cells, but some of the tons of cells do one job, while some of the tons of cells do another job. That is why if I handed you a piece of a maple tree you could tell right away if it was a piece of bark, root, or a leaf.
Each of those parts are made of cells. Each type of cell (leaf cells, bark cells, etc.) has a special task to do so the tree can survive. The leaf gathers sunlight to make food for the tree, but obviously the roots, being underground, away from the sun, don’t do the same job. They bring water to the leaves and anchor the tree in place. A leaf cell can only make more leaf cells and a bark cell can only make more bark cells.
All types of complex organisms have different cells to do different jobs. To better understand cell differentiation we are going use an example with which you are very familiar — your body.
FUN FACT: All cells are 90% water.
How are Cells organized?
Every living thing is made of separate cells. They can do their specific job, and work together.
Cells in your body are organized like a school district is organized. In a school there are levels of organization. Students are organized into classes. Classes are organized into grade levels. Grade levels are organized into schools. Schools are organized into a school district.
Life forms have a similar arrangement. Individual cells join together to form tissue, like muscle tissue, bone tissue, or skin tissue. Tissues join together to form organs, like your lungs, your brain, or your intestines. Organs join together to form a whole body system, like the skeletal system, nervous system, or the digestive system. All the body systems join to form the organism.
Comparing cells to schools would look something like this:
Example in a person
Level of organization in a person
Level of organization in a school
Muscle cell
Cell
Student
Muscle tissues
Tissues
Classes
Heart muscle
Organs
Grade Levels
Circulatory System
Organ Systems
Schools
Person
Organism
School District
Let’s Get Moving!
What happens when you run, jump, swim, just tap you fingers on the desk, or even yawn? Muscles help your body do these actions. Plants don’t move around so they don’t need muscle tissue which is made of muscle cells. These long stringy fibers can pull together and then relax. When a muscle cell in your body contracts, it is using energy to move some part of you. You know muscle cells in your arms are working when you pick up a heavy box. But they’re even busy extending and contracting when you smile, frown, breathe, or laugh.
Your heart muscle cells NEVER get a break, keeping your heart beating even when you are asleep.
ONLY SKIN DEEP??
Plants have a layer of outer cells to protect what’s inside, just like that plastic sandwich bag protects your bologna and cheese sandwich. You have a protective layer, too — your skin cells. Touch your hand and you’re touching many thousands of skin cells. All of your outer cells (the ones you can touch) are dead. But just underneath this surface are neat rows of living skin cells.
Squeezed in between those skin cells are other types of cells; nerve cells, which allow you to feel things; fat cells that keep you warm; and capillary cells that make sure all the cells are supplied with oxygen and nutrients from your bloodstream. Skin cells are shaped a little like building blocks, all fitting neatly together and holding all of you together.
The Eyes Have It
Your eyes have nerve cells that turn light into electrical impulses and then send them to your brain. Cone shaped cells pick up bright lights and colors and rod-shaped cells respond to dimmer signals. The retina of your eye contains about 137 million light-sensitive cells in an area about one square inch. There are 130 million rod shaped cells for black and white vision and 7 million cone cells for color vision. Dogs also have special light sensitive cells called cones, which are needed for color vision. However dogs don’t have as many cones, or as many types of cones, as people do. Dogs see greenish-blue colors as white or grey. They can tell the difference between blues and reds, but confuse colors ranging between greenish yellow and red. This means your dog may have a hard time spotting a red ball on a green lawn.
Bone Cells & Fat Cells
Bone cells aren’t all hard and brittle, like you might think. Like your other cells, they are soft and surrounded by membranes. But these cells need calcium and are grouped to form bony tissue. Without our bony skeleton to hold us up, we’d sink to the ground in a big heap.
Fat Cells look like a bunch of bubbles. They store energy and help insulate the body from cold. When you eat more calories than your body can use that day, your body stores that extra energy as fat, for later. If you run a long race or participate in a strenuous sporting event, you may need more energy than your body has taken in that day. You fat cells are ready to keep your body energized for those intense times.
Your body has many other types of cells. Each type has a specific job and looks different from other cell types, but does look like other cells of the same type. Bone cells look like other bone cells, but look nothing like liver cells.
Tools for Viewing Cells
A magnifying glass can magnify a cell 10-20 times.
An average microscope can magnify a cell 40, 100, & 400 times. An advanced optical microscope can magnify a cell 2,000 times.
An electron microscope can magnify a cell 1 million times.
.
Check out these helpful Web sites (current June 2004)
www.cellsalive.com
www.eurekascience.com
Heart Muscle Cell
Image copyright Dennis Kunkel.
Here is a micrograph (a photo taken through a microscope) of the muscle tissue in a human heart.

Green Power Easy – The Easy Guide To Solar And Wind Power.

admin — Wed, 02 Dec 2009 15:35:26 +0000

Green Power Easy Is The Easiest Guide To Solar And Wind Energy On The Planet. Convert Your Entire Home To Green Power, And Eliminate Your Power Bill!

Green Power Easy – The Easy Guide To Solar And Wind Power.

The Complete Idiot’s Guide to Green Living

admin — Fri, 27 Nov 2009 22:28:57 +0000

ISBN13: 9781592576623
Condition: NEW
Notes: Brand New from Publisher. No Remainder Mark.
Click here to view our Condition Guide and Shipping Prices

Product Description
The environmental movement and rising awareness of global warming have sparked an interest in green living. People want to know what they can do to live sustainable lives. In this book, you will find an overview of global warming and environmental degradation of air, water, and soil; what sustainable living is and how to do it; how to cut down on carbon output (the cause of global warming) with alternative cars and fuels; and environmentally friendly home and lawn c… More >>

The Complete Idiot’s Guide to Green Living

Mrs Meyers Clean Day, Cleaner Tlt Bowl Geranium, 32-Ounce

admin — Tue, 24 Nov 2009 18:53:20 +0000

Product Description
Who wants to clean the toilet? Mrs. Meyer’s Geranium Toilet Bowl Cleaner makes this nasty job more bearable. Our toilet bowl cleaner cleans and deodorizes your entire bowl without using chlorine or solvents, and is completely biodegradable. Our essential oils of Geranium, Rose, and Clove will fill your bathroom with a garden-fresh scent every time you clean. As with all Mrs. Meyer’s cleaning supplies, this amazing cleaner is made with natural essential oils, is biod… More >>

Mrs Meyers Clean Day, Cleaner Tlt Bowl Geranium, 32-Ounce

CYCLES Green Living Reusable Premium Canvas Tote

admin — Thu, 19 Nov 2009 17:25:56 +0000

Cycles tote is a movement to help bring our community together
Constructed of heavy-duty light grey color cotton canvas
Inside lining has black and white graphics
Three small easy to reach inside pockets for ipod, cell phone etc.
Measures 14″x16″x4″

Product Description
This unique designed original art tote is a representation of living green. And to make a difference and stand up for a green cause…. More >>

CYCLES Green Living Reusable Premium Canvas Tote

Mrs. Meyer’s Clean Day Soy Candle, Lavender, 7.2 Ounce Glass Jar

admin — Wed, 18 Nov 2009 14:32:34 +0000

Lead-free, cotton wick
Jar can be reused as a juice glass – collect a whole set

Product Description
Our popular kitchen candle is made from vegetable (soy) wax, which makes for a pleasing, lingering fragrance and an environmentally friendly product. Lead-free wick, too!… More >>

Mrs. Meyer’s Clean Day Soy Candle, Lavender, 7.2 Ounce Glass Jar

Mrs Meyers Clean Day, Surface Scrub Geranium, 11-Ounce

admin — Mon, 16 Nov 2009 13:54:16 +0000

Phosphate-free and biodegradable
Made with a natural ash and oxygen bleach
Important essential oils of Geranium, Rose, and Clove
Fragrance: Geranium Quantity: 11 ounces (311 grams)

Product Description
Good in more than just the kitchen, Mrs. Meyer’s Geranium Surface Scrub works on the grimy surfaces in your home. Use this cleanser on tile, stainless steel, professional cookware, porcelain fixtures and more. Our essential oils of Geranium, Rose, and Clove will fill your home with a garden-fresh scent every time you clean. As with all Mrs. Meyer’s cleaning supplies, this amazing cleaner is made with natural essential oils, is biodegradable and phosphate-free, and… More >>

Mrs Meyers Clean Day, Surface Scrub Geranium, 11-Ounce

Mrs. Meyer’s Clean Day Counter Top Spray, Geranium, 16 Ounce Bottle

admin — Mon, 16 Nov 2009 07:43:46 +0000

When empty, add 2 tablespoons of all-purpose cleaner and fill with water

Product Description
We took the basic formula of our All-Purpose Cleaner and added a special Vegetable Protein Extract, a naturally fresh way to remove odors. Great on all non-porous surfaces like finished wood and tile floors, counter tops, sealed stone, walls, porcelain, bathroom fixtures and more…. More >>

Mrs. Meyer’s Clean Day Counter Top Spray, Geranium, 16 Ounce Bottle