Levels of Organization

Transcription

1 Levels of Organization What do you think the 5 Levels of Organization are in the body?? Brainstorm with your group and write down what you think are the 5 Levels Pick a recorder.

2 Levels of Organization: The arrangement of specialized parts within a living thing. The labor (work) is divided among 5 different levels. What is Division of Labor??

3 Division of Labor Within multi-cellular organisms there is Division of labor. Division of labor - the work (labor) of keeping the organism alive is divided (division) among the different parts of the body. Each part has a job to do and as each part does its special job, it works in harmony with all the other parts.

4 1 st Level - Cells Cells are the basic unit of living things. They are very diverse and all parts of the cell perform specific functions. Plant Cell Animal Cell

5 Cells: LOTS of Different Kinds! Here are two examples. Can you guess what kind? Nerve Cells Skin Cells

6 Second Level: Tissues In any multi-cellular organism, cells rarely work alone. Tissues are the second level Tissues are Cells that are similar in structure and function and are usually joined together to form tissues. There are four basic/major types of tissues in the human body: Muscle tissue, nerve tissue, connective tissue, and epithelial tissue. (There are other kinds of tissues besides these.) Other kinds of tissue include bone tissue (a strong solid tissue that gives you shape and support) made of bone cells in your body form bone tissue. Blood cells in your body are part of blood tissue, a liquid tissue responsible for transporting food and oxygen throughout the body.

7 Let s Look Again Here are the cells we saw before, but if you look closely, you can see that they all look similar. Nerve cells working together make nerve tissue, and skin cells make up a special type of epithelial tissue.

8 Taken One At A Time. Connective tissue connects & supports parts of the body- examples: Blood, fat, ligaments, cartilage, bones, tendons Nerve tissue carries messages back & forth between brain & other parts of body. Examples: brain, spinal cord,& nerves Epithelial tissue covers & lines body surfaces & organs, inside & out. Provides a protective barrier. Example: skin Muscle tissue contracts, or shortens - makes parts of your body move.

9 Level Three: Organs When a bunch of different types of tissues work together, they form an organ. There are many organs in the body. How many can you name?? GET IT????

10 Level Four: Organ Systems Each organ in your body is part of an organ system organ system, group organs working together to perform a major function. For example, your heart is part of your circulatory system, which carries oxygen & other materials throughout the body. Besides the heart, blood vessels are organs that work in your circulatory system.

11 nervous system detects & interprets info from environment outside & within body; controls most body functions. immune system: fights disease. excretory system: removes wastes. endocrine system: controls body processes by means of chemicals, like hormones.

12 Muscular system: enables body to move; moves food through the digestive system, and keeps the heart beating. Skeletal system: supports and protects body, and works with the muscular system to allow movement; makes and stores blood cells and stores some other materials.

13 Digestive system: takes food into the body, breaks the food down into smaller particles, and absorbs the digested materials. The respiratory system takes oxygen into the body and eliminates carbon dioxide.

14 Level 5 Organisms - Entire living things that can carry out all basic life processes. All other levels form together to make organisms Protists Plants Animals Humans

15 Let s Review. 1 st Level: Cells working together form 2 nd Level: Tissues, which can form 3 rd Level: Organs, which work together to form 4 th Level: Organ Systems, which work together to form 5 th Level: Organisms!