Title: Invertebrate Unit Articles - Page 2 of 3 - BIOLOGY JUNCTION
Headings: Category:
Invertebrate Unit

Category: Invertebrate Unit
Invertebrate Notes
Notes on Invertebrate Animals
Phyla:
2. Cnidaria
3. Platyhelminthes -flatworms
8. Arthropoda
SPONGES
Cnidarians
Platyhelminthes (flatworms)
Annelids (segmented worms)
Arthropods
e. open circulatory system
Echinoderms
Invertebrate Worksheet
Invertebrate Lecture Worksheet
All Materials © Cmassengale
Sponges
Cnidarians
Mollusks
Annelids
Arthropods
Echinoderms
Notes on Invertebrate Animals
Notes on Invertebrate Animals
Phyla:
SPONGES
Cnidarians
Platyhelminthes (flatworms)
Annelids (segmented worms)
Arthropods
Echinoderms
Invertebrate Notes
Invertebrate Phyla:
hydra
Coral
Sponges
Insect
Earthworm Facts
Read Our Q&A About Earthworm Facts
Earthworm Worksheet
Echinoderm
Clam Dissection Questions
Crayfish Dissection
By Day: Day 1 Day 2 Day 3
Day 1
I. Abdomen – Ventral View (Day 1) top
II. Head – Ventral View (Day 1-2) top
II. Cephalothorax – Dorsal View (Day 1-2) top
Day 2
Make a Dorsal Midline Incision from the posterior end of the thorax to the posterior end of the rostrum using the rounded scissors w/ the rounded end down! Open the carapace and pin it back.
III. Thorax – Dorsal View, Part I (Day 2) top
IV. Thorax – Dorsal View, Part II (Day 2) top
Day 3
V. Thorax – Dorsal View, Part III (Day 3) top
Gently remove the Heart.
VI. Thorax – Dorsal View, Part IV (Day 3) top
Gently remove the Cardiac Stomach.
VII. Abdomen – Dorsal View, Part I (Day 3) top
Make a Dorsal Midline Incision from the anterior end of the abdomen to the posterior end of the abdomen using the rounded scissors w/ the rounded end down! Open the exoskeleton and pin it back.
VIII. Abdomen – Dorsal View, Part II (Day 3) top
Gently remove the Abdominal Flexor Muscles.
Drawings:
Use a PENCIL!!
Make the drawings “larger than life” size, as the specimens are so small.
Draw the general shape (outline) and location of the organs, as the squiggles so many of you use to “shade” your drawings make your drawings sloppy and hard to interpret.
Include Labels on all drawings.
Labels should start outside the drawing, and be connected to the structure by arrows with tips (===>).
The Tip of the arrow should be touching the structure.
Be sure to include the magnification for any drawings done with the dissecting microscope.
Hang on to the drawings; they will all be handed in later, together with some questions to answer!
Modified from Lazaroff Biology

Content: Trichinosis can affect the heart. Another roundworm, Ascaris, parasitizes human lungs. The Filaria worm attacks the lymphatic system causing great swelling. Hookworms and pinworms are also roundworms which parasitize humans. Rotifers
The phylum Rotifera includes microscopic worms found in aquatic and soil habitats. They have a crown of cilia at their head end surrounding their mouth for movement and feeding. Their bodies are covered with an external layer of chitin. Having separate sexes, they reproduce sexually. Some species contain only females and reproduce by parthenogenesis (unfertilized eggs developing into females). Mollusks
The phylum Mollusca contains snails and slugs, bivalves, octopus, squid, and the chambered nautilus.