Earthworm Dissection Comparing Anatomy Invertebrates Objective To construct

Earthworm Dissection Comparing Anatomy: Invertebrates Objective: To construct a paper model of the earthworm Bell work: 1. Earthworms are “segmented” animals. What does “segment” mean? “Segment” means to be divided into sections. An earthworm is divided into little rings. The rings on the outside tell a story about the inside Now check out this cute – earthworms have a brain, five cartoon on earthworm hearts, and a digestive system! regeneration… They’re segmented! © 2014 Getting Nerdy, LLC

Earthworm Dissection Comparing Anatomy: Invertebrates What You Do: Want to get a hands-on feel for the earthworm? Let’s construct a three-dimensional worm. This is called a “scienstructable”… a constructable, instructable, tangible science model! First, complete your table on your scienstructable key and function sheet, identifying the organs of the worm we’ll be exploring and the colors we will use to create our scienstructable. Use the information from your teacher to fill in your chart. © 2014 Getting Nerdy, LLC

On your paper, you will write the name of the organ and then shade in the corresponding box the color indicated to the right. These will be the same colors you will color each organ on your worm scienstructable. © 2014 Getting Nerdy, LLC Number Organ Color 1 Brain Grey 2 Buccal Cavity & Pharynx Green 3 Crop Green 4 Gizzard Green 5 Intestine Green 6 Aortic Arches Red 7 Dorsal Blood Vessel Red 8 Seminal Vesicle Yellow 9 Seminal Receptacle Yellow 10 Clitellum Pink 11 Segments Brown 12 Anus Green 13 Prostomium Brown 14 Setae Black

Earthworm Dissection Comparing Anatomy: Invertebrates What You Do: Once you have completed your key, begin the reading to determine what all of these organs do – many of them have the same function as human beings! Remember to use good reading strategies as you read. On your paper, write the function of each organ in the appropriate column. For example: Number Organ Color Function 1 Brain Grey Nervous system organ responsible for controlling the body 2 Pharynx Green … © 2014 Getting Nerdy, LLC dirty gerdy smelly mellie gnllc

Number Organ Function 1 Brain nervous system organ responsible for controlling the body 2 Buccal Cavity & Pharynx muscular organ that acts as a suction pump to pull the dirt into the digestive system 3 Crop soft sac that serves as a storage area for dirt 4 Gizzard muscular organ that grinds dirt into fine particles 5 Intestine absorption of nutrients from digestive tract into bloodstream Check your work! Aortic Arches five muscular blood vessels that work together to move blood and nutrients 7 Dorsal Blood Vessel carries blood forward in the body 8 Seminal Vesicle make sperm 9 Seminal Receptacle receive sperm 10 Clitellum produces egg capsules 11 Segments rings around earthworm body 12 Anus opening at end of digestive tract that releases waste 13 Prostomium helps with digging through the dirt and pushing dirt into the buccal cavity 14 Setae bristle-like hairs located on belly that help with movement 6 © 2014 Getting Nerdy, LLC

Earthworm Dissection Comparing Anatomy: Invertebrates What You’ll need to create your scienstructable: Colored worm template Scissors Colored pencils Small amount of glue or a glue stick Construction paper What You Do: Now it’s time to color your worm! Color the organs according to your key. You can color the outside of the worm’s body VARIOUS SHADES OF BROWN! Once you are done coloring, follow the directions to put your worm scienstructable together. Be sure to follow the directions exactly! © 2014 Getting Nerdy, LLC

Earthworm Dissection Comparing Anatomy: Invertebrates What You Do: 1. CAREFULLY cut out your worm and organs - no jagged edges! Be sure to cut AROUND to the small hair-like structures on the outside of the worm’s body as these are important organs of the worm. DO NOT cut off the tabs as you will use these to assemble your worm. 2. Glue your Scienstructable Key and Function sheet to one side of your construction paper, placing a small amount of paste on the back of your paper. 3. On the other side of your construction paper, paste down your cut out worm body. © 2014 Getting Nerdy, LLC

Earthworm Dissection Comparing Anatomy: Invertebrates For all organs to be pasted down, you will apply glue to each tab and match up the lettered tabs as follows: 1. Attach the INTESTINE by tabs A & B to A & B on the worm body 2. Attach the GIZZARD by tab C to C on the worm body 3. Attach the CROP by tab D to D on the worm body 4. Attach the SEMINAL VESICLES by tabs E & F to E & F on the worm body 5. Attach the AORTIC ARCHES by tab G & H to G & H on the worm body. It will “arch” off of the worm base. © 2014 Getting Nerdy, LLC

6. Fold the SEMINAL VESICLES dotted line near their tabs so that they “lay” around the aortic arches 7. Cut the WORM BACK in half along the solid black line through the center. Place a small amount of glue on tabs I & J and paste each half down on the worm, aligning it with the worm body on tabs I & J. You should be able to lift the skin open like a book to reveal the organs underneath. © 2014 Getting Nerdy, LLC