Katie Eudy » Katie Eudy WSMS 7th Grade Science

Katie Eudy WSMS 7th Grade Science

Today's (12.03) Homework
Cells Essential Question Paragraph due Wednesday December 5
Finish "Levels of Organization" Worksheet (if needed) SCROLL DOWN!
We are currently learning about Human Body Systems!
December at a glance:
  • Dec 5: Progress Reports go home
  • Dec 7: Social
  • Dec 18: Tentative TEST 4 date
  • Dec 19: Early Release @ 1:00
  • Dec 20-Jan 1: Winter Vacation
Please be sure that you and your student have access PowerSchool to stay updated on your student's assignments and grades.  Your student is required to be aware of their grades and assignments for this science class at ALL times.
Want to Contact Mrs. Eudy???  Here's how you can!
Email is the best way to get a quick response!  I check my email throughout the day and most evenings.
Phone: Call West Stanly Middle School >704.961.3600< and ask for Mrs. Eudy.
This is not the most sure way to speak to me, as I teach classes:) and in those times I can't answer.  I also serve as co-AD at WSMS, which means I am often out of my classroom during my planning block and afterschool.  If you would like to speak to me on the phone the best way to do so is to email me requesting a phone conference and providing a good phone number to reach you.  I will call you back as soon as I can (which is usually within 24hrs)!
My Planning Block > 10:22am-11:52am          After-School > 3:00pm-3:30pm
Levels of Organization
In unicellular (single-celled) organisms, the single cell performs all life functions. It functions independently. However, multicellular (many celled) organisms have various levels of organization within them. Individual cells may perform specific functions and also work together for the good of the entire organism. The cells become dependent on one another.

Multicellular organisms have the following 5 levels of organization ranging from simplest to most complex:

cellimageLEVEL 1 - Cells

  • Are the basic unit of structure and function in living things.
  • May serve a specific function within the organism
  • Examples- blood cells, nerve cells, bone cells, etc.

tissueimageLEVEL 2 - Tissues

  • Made up of cells that are similar in structure and function and which work together to perform a specific activity
  • Examples - blood, nervous, bone, etc. Humans have 4 basic tissues: connective, epithelial, muscle, and nerve.

heartimageLEVEL 3 - Organs

  • Made up of tissues that work together to perform a specific activity
  • Examples - heart, brain, skin, etc.

skeletonimageLEVEL4 - Organ Systems 

  • Groups of two or more organs that work together to perform a specific function for the organism.
  • Examples - circulatory system, nervous system, skeletal system, etc. 
  • The Human body has 11 organ systems - circulatory, digestive, endocrine, excretory, immune(lymphatic), integumentary, muscular, nervous, reproductive, respiratory, and skeletal.
organismsimageLEVEL 5 - Organisms 
  • Entire living things that can carry out all basic life processes. Meaning they can take in materials, release energy from food, release wastes, grow, respond to the environment, and reproduce.
  • Usually made up of organ systems, but an organism may be made up of only one cell such as bacteria or protist.
  • Examples - bacteria, amoeba, mushroom, sunflower, human

 The levels of organization in the correct order then are: cells -> tissues -> organs -> organ systems-> organisms

Updated June 15, 2000 by: Glen Westbroek
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