General Anatomy The human body: Levels of organization - STIFF
Levels of organization and Body Systems
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LEVELS OF ORGANIZATION AND BODY SYSTEMS
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WHAT DO YOU ALREADY KNOW ABOUT CELLS?
HOW ARE ORGANISMS ORGANIZED?
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Organism
Also known as living things
Beetles are some of the most successful ________ on Earth.
All __________ have the 4 needs of life.
All __________ have the 6 characteristics of life.
Some ____ are multi-celled and some are uni-celled.
About 1.75 million ____ have been discovered on Earth.
CAN YOU THINK OF THE IMPORTANT WORD THAT IS HIDDEN BELOW?RAISE YOUR HAND WHEN YOU ARE READY TO GIVE AN ANSWER.
3
4
5
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1
2
?
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ORGANISMS ARE ORGANIZED!
There are five levels of organization in advanced organisms. From the outside in, they are:
•5. Organism
•4. Organ Systems
•3. Organs
•2. Tissues
•1. Cells
biggest
smallest
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LEVEL 5: ORGANISMDefinition: Any living thing. (It has all the characteristics of life.)
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LEVEL 5: ORGANISMOrganisms sometimes exist as unicellular (single cell), but most are multicellular (many cells) such as plants and animals.
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LEVEL 4: ORGAN SYSTEM•Organ + Organ = Organ System
•Definition: a group of organs that work together and perform a specific task.
•You have 11 organ systems in your body.
•Ex: digestive system, skeletal system, etc.
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LEVEL 4: ORGAN SYSTEM
•Are there any organ systems we could live without?
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LEVEL 3: ORGANS•Tissue + Tissue = Organ
•Definition: A group of tissues working together
•ExamplesAnimal organs: Heart, stomach, brain, lungs,
intestines
Plant organs: Roots, stems, leaves
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LEVEL 3: ORGANS
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LEVEL 3: ORGANS
Are there any organs we could live without?
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LEVEL 3: ORGANS
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LEVEL 2: TISSUES
•Cells + Cells = Tissue
•Definition: A group of cells that work together to meet a common purpose
No, not that kind of tissue!
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LEVEL 2: TISSUES
No, not that kind of tissue!
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LEVEL 2: TISSUES
•There are 3 kinds of plant tissue:
•Dermal (protection)
•Ground (storage and energy)
•Vascular (transportation)
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LEVEL 2: TISSUES•There are four kinds of animal tissue:
•Nerve
•Muscle
•Connective
•Epithelial (protection)
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ORGAN MADE OF TISSUES
•Connective tissue makes up organs like the bones, blood vessels, tendons, ligaments, etc…
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ORGAN MADE OF TISSUES
•Nerve Tissue Makes up organs like the brain, spinal cord, and nerves.
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ORGANS MADE OF TISSUES
•Epithelial Tissue makes up organs like the skin, hair, and fingernails
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ORGAN MADE OF TISSUES
•Muscle tissue makes up organs like the heart, stomach, kidneys, lungs, biceps, etc…
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LEVEL 1: CELLS•Definition: The basic unit of all living things
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LEVEL 1: CELLS•Remember, an organism can be just ONE cell (unicellular), or else it is made of MANY cells (multicellular)
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LEVEL 1: CELLS
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LEVELS OF ORGANIZATION
Cells Tissues OrgansOrgan
Systems Organism
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Cell (s)
The ___ is the basic unit of life.
A human has approx. 60 -100 trillion ___.
Gametes ______ divide by meiosis
Somatic ______ divide by mitosis
All living things are made of at least 1.
Includes eukaryotic
and prokaryotic
types
CAN YOU THINK OF THE IMPORTANT WORD THAT IS HIDDEN BELOW?RAISE YOUR HAND WHEN YOU ARE READY TO GIVE AN ANSWER.
1
2
3
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1
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MATCH THE FOLLOWING TO LEVELS OF ORGANIZATION…
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The earthworm’s gizzard
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Fire Lord Ozai
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A human heart
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A slice of a human heart
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A human heart plus all the blood vessels in the body
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A maple leaf
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Epithelial, muscle, nerve, connective
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ALL of the roots of a tree
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Dermal _____, ground ______, and vascular _______
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Muscle cells come together to form muscle _________
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A plant’s vascular tissue is made up of plant _______.
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Respiratory, circulatory, muscle, digestive, reproductive, skeletal,
nervous
These are all examples of __________.
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These float around in your blood, bringing you oxygen.
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Which of the following is an example of an organ?
A large intestine
B inner lining of the stomach
C digestive system
D muscle fiber
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Which of the following is an example of an organism?
A a mouse
B a skull bone
C a nerve cell
D skin
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Saliva contains an enzyme which begins to break down starch as soon as you put it into your mouth. If a person did not produce saliva, which would be most affected?
Most directly affected would be their _____________.
A digestive system
B blood cells
C nervous system
D liver