Invertebrate Zoology Lecture Notes Ppt New [upd]
Flatworms (planarians, flukes, tapeworms); bilateral symmetry and cephalization.
Defining Invertebrates
: Open circulatory system with a hemocoel in most classes; closed circulatory system in cephalopods to support high metabolic demands. Major Classes : invertebrate zoology lecture notes ppt new
Ecdysozoans are united by —the periodic shedding or molting of a non-living outer cuticle to allow for physical growth. This process is hormonally regulated by ecdysteroids. Phylum Nematoda (Roundworms)
Comprehensive Invertebrate Zoology Lecture Notes Invertebrate zoology is the study of animals without a backbone. These organisms make up over 95% of all animal species on Earth. This comprehensive guide serves as a foundational text for students and educators seeking structured lecture notes for academic presentation and study. Module 1: Introduction to Invertebrates and Body Plans 1. What is an Invertebrate? Animals lacking a vertebral column (backbone). Diversity: Encompasses over 30 phyla. This process is hormonally regulated by ecdysteroids
Possess a tough, non-living cuticle that must be shed to grow.
Bivalvia : Clams, oysters, and mussels. Two-part hinged shell, flattened body, no radula; they filter-feed using enlarged gills (). This comprehensive guide serves as a foundational text
: A network of fluid-filled canals unique to echinoderms. It runs a hydraulic system used for movement, food capture, and respiration. Pathway : Water enters the top filter plate ( madreporite ) →right arrow passes through the stone canal →right arrow flows into the ring canal around the mouth →right arrow branches out into radial canals along each arm →right arrow
: Formed by internal calcareous plates and spines known as ossicles , situated just beneath the epidermis.
Radula , a rasping, tongue-like organ (absent in bivalves). Major Classes:
