Levels of organization and Body Systems

What do you already know about cells? How are organisms organized?

Can you think of the important word that is hidden below Can you think of the important word that is hidden below? Raise your hand when you are ready to give an answer. 1 About 1.75 million ____ have been discovered on Earth. 6 Some ____ are multi-celled and some are uni-celled. 2 Also known as living things ? Organism Beetles are some of the most successful ________ on Earth. 5 3 All __________ have the 6 characteristics of life. Organism 4 All __________ have the 4 needs of life.

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

Level 5: ORGANISM Definition: Any living thing. (It has all the characteristics of life.)

Level 5: ORGANISM Organisms sometimes exist as unicellular (single cell), but most are multicellular (many cells) such as plants and animals.

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.

Level 4: Organ System Are there any organ systems we could live without?

Level 3: Organs Tissue + Tissue = Organ Definition: A group of tissues working together Examples Animal organs: Heart, stomach, brain, lungs, intestines Plant organs: Roots, stems, leaves

Level 3: Organs

Level 3: Organs Are there any organs we could live without?

Level 3: Organs

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! 

Level 2: Tissues No, not that kind of tissue! 

Level 2: Tissues There are 3 kinds of plant tissue: Dermal (protection) Ground (storage and energy) Vascular (transportation)

Level 2: Tissues There are four kinds of animal tissue: Nerve Muscle Connective Epithelial (protection)

Organ made of tissues Connective tissue makes up organs like the bones, blood vessels, tendons, ligaments, etc…

Organ made of tissues Nerve Tissue Makes up organs like the brain, spinal cord, and nerves.

Epithelial Tissue makes up organs like the skin, hair, and fingernails Organs made of tissues Epithelial Tissue makes up organs like the skin, hair, and fingernails

Organ made of tissues Muscle tissue makes up organs like the heart, stomach, kidneys, lungs, biceps, etc…

Level 1: Cells Definition: The basic unit of all living things

Level 1: Cells Remember, an organism can be just ONE cell (unicellular), or else it is made of MANY cells (multicellular)

Level 1: Cells

Levels of Organization Cells Tissues Organs Organ Systems Organism

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. Includes eukaryotic and prokaryotic types 1 1 Somatic ______ divide by mitosis 6 The ___ is the basic unit of life. 2 ? Cell (s) All living things are made of at least 1. 5 Gametes ______ divide by meiosis 3 Cell 4 A human has approx. 60 -100 trillion ___.

Match the following to levels of organization…

The earthworm’s gizzard

Fire Lord Ozai

A human heart

A slice of a human heart

A human heart plus all the blood vessels in the body

A maple leaf

Epithelial, muscle, nerve, connective

ALL of the roots of a tree

Dermal _____, ground ______, and vascular _______

Muscle cells come together to form muscle _________

A plant’s vascular tissue is made up of plant _______.

Respiratory, circulatory, muscle, digestive, reproductive, skeletal, nervous These are all examples of __________.

These float around in your blood, bringing you oxygen.

Which of the following is an example of an organ 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

Which of the following is an example of an organism Which of the following is an example of an organism? A a mouse B a skull bone C a nerve cell D skin

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