BIO 5 Lecture Notes - Lecture 8: Chemoreceptor, Trochophore, Radula
Document Summary
Molusca include soft body animals like snails, slugs, and kittens. Common features to see in this phylum: it has four body regions, 1. The head most have this defined thing: when they do have a head, they have various sensory structures, including photoreceptors, simple eyes, some have complex eyes, you will see chemosensory, touch receptors. You will also have the mouth in the head which you will have a radula it"s a tongue with teeth: 2. Involved in locomotion: foot could be modified into arms, 3. Visceral mass everything that"s not the foot or the mouth. In aquatic mollusks, you will see gills cal ctenidia: the rest of the organ system, you have seen these in ctenophores, some groups you will see lungs which are vascular cavities where air moves through, 4. Mantle fold of the dorsal wall: jacket for the gylceral mask, look at the list where things will dump out, look up each structure and know their location.
