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The ten levels of biological organization
Transcript of The ten levels of biological organization
level is the cell and the largest is the biosphere. As we move
from cells to the biosphere the levels get more complex and
include more of the levels below. Cells are the basic building
block of life. A life form can
be only one cell in size or it
can be a group of trillions. Cells Tissues are a collection of
cells working together. You
might of heard of connective
tissue, that is cells combined
with non-living material to
make a support structure.
Other tissue types include
muscle, nerve, and epithelial. Tissue Organs are two or more types of
tissues working together. In humans
organs include the liver, heart,
kidneys, brain, lungs, and skin. Your
skin is made of three layers containing
several tissue types including
epithelial, connective, nerve, and
Organs Organ systems are the combination of several organs
working together to accomplish a purpose. There are many
organ systems in our body: nervous system, skeletal system,
reproductive system, circulatory system, and digestive system.
The digestive system starts with our mouth chewing up and
swallowing food, then it moves down the esophagus to the
stomach where digestion hits full stride. The digested food
moves into the small intestine where many of the nutrients
are absorbed. In the large intestine the final digestion occurs
as well as water absorption. Then the parts of the food we
can't use are passed out of the body through the anus. Organ Systems Humans have several organ systems--trees also have organ systems that move nutrients through the tree, anchor the tree to the soil, convert energy from the sun etc. When organ systems combine they form an organism. An organism is what we often think of as a living thing. Organisms include humans, trees, roses, cockroaches, mushrooms, algae, grass, corn, dogs, the list goes on and on and on. Organism Population Community Ecosystem Biome Biosphere When a group of the same
type of organism lives in the
same area biologists call them
a population. For example all
of the grey squirrels in
springfield are a population of
squirrels. All of the grey
squirrels in Branson are a
different population. All of the populations in an area are called a community. In the Ozarks, all of the Oak trees, poison ivy bushes, squirrels, earthworms, fungus, deer, hawks, etc. All make up a community. It is important to
remember communities include all living things in that area. Ecosystems are defined by there environment.
An ecosystem includes the area that has the same
climate. Using the Mountains of Colorado as an
example: The area that is above 11,000 feet has a
certain climate. All of the communities that live
in that area make up the ecosystem. An ecosystem is
the combination of living and non-living things within
an area. All of the ecosystems that
are the same around the
world are put together to
make a biome. All of the
mountains, deserts, temperate
forests, jungles, oceans, lakes,
and tundras each make a biome. A biosphere is all the biomes
on Earth. So essentially, a
biosphere includes all of the
life on the planet. All of the
humans, trees, bugs, fish, slugs,bacteria, and bunnies.