Level of Organization Worksheets

Related ELA Standard: RI.6-8.1 & RST.6-8.1

Core Standard
Answer Keys Here

Living things come in many different sizes and shapes. Some living things are made up of just a single cell and can complete all their needed functions in that capacity. All living things are made up of these basic units (cells). There are also much more complex multicellular organism living. How sophisticated these organisms can become can defined in biology by the levels of organization that it demonstrates. A cell, as we already discussed is the lowest level of organization or foundation. When a series of cells work together to perform a certain task, we call that next level of organization a tissue. When you have a series of tissues that cooperate to complete duties on a larger scale, they form organs. When a group of organs work together to perform a specific body function, they form an organ system. The highest level of organization is a functional organism. This collection of worksheets can be used by students to learn how to identify and classify a level of biological organization that is exhibited by a living thing.

Level of Organization Worksheets To Print:

The Five Levels - Fill in the blank with terms from the word bank.

What's Missing? - Draw the missing items in the box. Label each picture.

Flowchart - Fill in the flow chart using words from the Word Box.

The Pyramid - Label the diagram below to show seven levels of organization of a living thing. To the right of the pyramid, write the definition for each level.

Simple to Complex - Fill in the blanks. Put the items in order from simplest to most complex.

Cellular Level - Start simple and we will work our way up.

The Tissue Level - You would be suprised what students draw to depict this. I'm sure you can guess.

Organ Level - Can you name three?

Organ Systems - Better question: Can you name three of these?

Organism Level - In some cases organisms can have multiple classifications.

It Is a Spiral - Label the diagram below to show the five levels of organization of a living thing.

Put It Together - What 6 things do all living things have in common?

Examples - You will be asked to give specific examples of each level.

Lowest to Highest - Explain the classification of each image and then sort everything that you have identified in the correct order.

Boxes Up - Illustrate and label the diagram as the instructions indicate.

What Are The Levels Of Organization In Living Things?

Biologically speaking, there are different levels of organization in living things. Cells are the basic level of every living body. Some living things just remain in the form of a single cell, like bacteria, yeast, and protists; they are known as unicellular organisms. But what happens when multiple cells join together? What level comes next?

 

1) Cell


Every life begins with a cell, the fundamental unit of structure of every living being. Your body is made of trillions of cells.


Cells provide structure and support to living bodies, convert the nutrients from food into energy, and help them grow.


They consist of three main parts: cell membrane, nucleus, and cytoplasm.


- The cell membrane is like a door surrounding each cell. It allows substances to move in and out of the cell.


- The nucleus is like the cell’s brain that controls all its activities, including the growth and production of energy.


- The cytoplasm is a gel-like liquid in the cells, consisting of water, nutrients, and other substances. It is like the laboratory where our cells carry out all chemical reactions for our body.



2) Tissue


When cells of the same kind stick together, they form a tissue. Each tissue is responsible for a specific job. There are four kinds of tissues: epithelial, muscle, connective, and nervous tissue.


- Epithelial Tissues: They are the groups of cells are responsible for the covering through which our bodies receive external signals. These tissues help us see, hear, smell, and feel.


- Connective Tissues: They are the groups of cells responsible for binding other tissues and supporting them.


- Muscle Tissues: They are the group of cells responsible for the body’s movement.


- Nervous Tissues: They are the group of cells responsible for carrying messages between different body parts.



3) Organs


When one or more types of tissues work together to perform a specific job, they form an organ. Living things may have different kinds of organs.


- Humans have organs like the brain, stomach, liver, kidney, etc.


- Plants have organs like stems, roots, leaves, etc.



4) Organ System


When different organs work together to perform one or multiple tasks inside our bodies, they are known as organ systems. For example, organ systems in the human body include muscular, skeletal, nervous, endocrine, cardiovascular/circulatory, respiratory, urinary, integumentary, immune, reproductive, and digestive systems.


- Muscular System: It consists of skeletal, cardiac, and smooth muscles.


- Cardiovascular System: This system is dedicated to one of the main organs of human beings, the heart. In this system, the heart pumps blood to the whole body with the help of arteries, capillaries, and veins.

- Digestive System: This system breaks down food into small nutrients that our bodies can absorb for energy and growth.



5) Organism


They are individual living beings made up of an organized structure. It means every living thing in this world is an organism, including plants, animals, and bacteria. Organisms of similar structures are known as species.