A broad, flat sole used for crawling via muscular waves.
Open system with a heart (one ventricle and one or two auricles). A broad, flat sole used for crawling via muscular waves
Biology, 7th Grade Topic: Diversity, Structure, and Role in Nature 📂 Slide 1: Introduction Definition: Gastropods are the largest class of mollusks. Species: Over 100,000 known species. Habitat: Occupy sea, freshwater, and land. Key Feature: A single, often spiral-shaped shell. 📂 Slide 2: External Structure 7th Grade Topic: Diversity
Lives in freshwater, breathes atmospheric air. 000 known species. Habitat: Occupy sea
Features eyes and one or two pairs of tentacles (sensory organs).
Evolutionarily lost their shells to move into tight spaces.
Use high-quality photos of a Grape Snail (Vinogradnaya ulitka) and a Slug (Slizen).