Invertebrate Zoology Lecture Notes Ppt New Patched Jun 2026

Notochord, dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail.

Protects against physical damage and dehydration. Requires molting (ecdysis) to allow body growth. invertebrate zoology lecture notes ppt new

No body cavity. The space between the ectoderm and endoderm is packed with solid mesermal parenchyma tissue. (Example: Platyhelminthes). Notochord, dorsal hollow nerve cord, pharyngeal slits, and

: Insects defined by a distinct three-part body plan. Module 9: Phylum Echinodermata General Characteristics Deuterostome development pattern. Secondary radial symmetry (pentaradial as adults). Endoskeleton composed of calcareous ossicles. Water vascular system driving tube feet locomotion. Water Vascular Pathway No body cavity

Mostly aquatic. Two pairs of antennae. Biramous (branched) appendages.

, reshaping our understanding of cephalopod evolution . Other species exhibit nearly supernatural abilities:

Cephalopods: Octopuses, squids, nautiluses. Active marine predators with a modified foot transformed into arms or tentacles. Feature highly evolved compound eyes and rapid signaling nerves. Phylum Annelida (Segmented Worms)