1. Levels Of Organization
7.12C- recognize levels of organization in plants and animals, including cells, tissues, organs, organ systems, and organisms.

2. Title: Hierarchy of Organization
Complete on page 61
Draw a pyramid like the one below with 13 rows. Place in order the twelve terms with the smallest term at the bottom of the pyramid. The terms are as follows: biosphere, atom, community, molecule, biome, cell, tissue, ecosystem, organ, organ system, organism, population, organelle

3. Smallest parts of matter
Recall from 6th grade science: the smallest parts of matter are atoms.
The Latin word atoma literally means indivisible
Atoms come together to form molecules. These molecules make up the organelles or components of a cell.

4. The levels of organization from simplest to most complex are:
Cells
Tissues
Organs
Organ System
Organism

5. Cells
The unit of life and the basic unit of structure and function in the human body
Though all cells perform the processes that keep humans alive, they also have specialized functions as well.
Examples may be nerve cells (neurons), blood cells, and bone cells.

6. Tissues
A group of specialized cells that work together to perform the same function.
There are four basic types of tissue in the human body:
Nerve tissue
Muscle tissue
Epithelial tissue
Connective tissue

7. Tissues
Nerve tissue – carries impulses back and forth to the brain from the body

8. Muscle tissue
Muscle tissue – (cardiac, smooth, skeletal) contract and shorten, making body parts move
There are 3
types:
Skeletal
Cardiac
Smooth

9. 3. Epithelial tissue – covers the surfaces of the body, inside (as lining and /or covering of internal organs) and outside (as layer of skin)

10. 4. Connective tissue – connects all parts of the body and provides support (for example tendons, ligaments, cartilage, and blood).

11. Organs
A group of two or more different types of tissues that work together to perform a specific function.
The task is generally more complex than that of the tissue.
For example, the heart is made of muscle and connective tissues which functions to pump blood throughout the body.

12. Systems
A group of two or more organs that work together to perform a specific function.
Each organ system has its own function but the systems work together and depend on one another.
There are eleven different organ systems in the human body: circulatory, digestive, endocrine, excretory (urinary), immune, integumentary, muscular, nervous, reproductive, respiratory, and skeletal.

13. Organism
All of the organ systems come together to form an organism

14. Population
a group of organisms of the same species

15. Community
A group of organisms of different species; a collection of populations

16. Ecosystem
The biotic and abiotic components of an environment

17. Biome
A large geographic area of the same climate and precipitation; may contain one or more ecosystems

18. Biosphere
The part of the Earth that supports life