Essays on Crayfish

Influence of Temperature and Neurotransmitters on Heart Rate in crayfish

TA for the Experiment: Introduction The cardiovascular system achieves key physiological functions in animals. Particularly, crayfish (Procambarus clarkia), also known as freshwater lobster, have been used to study physiological processes. This is because it is easier to study them in this species than in any other organism. In Crayfish, the circulatory system is open. Blood moves from the heart through the arteries and goes back through the open sinuses. Their heart is located in the cephalotorax, in front of the first abdominal segment, in the dorsal portion. Basic heart rate beat and rhythm in adult crustaceans depends on a ...

Introduction

The objective of this report is to summarize the key methods, procedures, goals and objectives, and takeaways from a series of individual laboratory experiments conducted throughout the course. Specifically, it is a summary of Exercises 1 on Phylum Porifera (Sponges), 2 on Phylum Cnidaria (Hydras), 3 on Phylum Platyhelminthes (Planarians), 4 on Phylum Annelida (Clamworms and Earthworms), 5 on Phylum Mollusca (Clams), and other exercises on Phylum Arthropoda (Crayfish), Deuterostome (Phylum Echinodermata, Sea Star), among others. Despite their number, the individual laboratory experiments, in fact, have one thing in common. That is their key objective is to be able ...

Lab Report Comparing the Anatomy of Crayfish and Grasshopper

Introduction The aim of the investigation is to compare and contrast the external anatomical characteristics of two classes of the Phylum Arthropoda, Class Crustacea and Class Insecta. A crayfish was used to represent the Class Crustacea and a grasshopper was to represent the Class Insecta. Arthropods are the most abundant and diverse group of animals on the planet. The organisms in this Phyla share common characteristics which include: the body of most arthropods is covered with chitin hardened into an exoskeleton. In crustacean, the chitin is hardened by calcium. In insects, the chitin is tanned, chemically bonded with ...