Skachat Besplatno Prezentatsii Po Biologii 7 Klass Briukhonogie Molliuski -

Includes a radula (a "grater" with chitinous teeth) to scrape food. Respiration: Aquatic species: Gills . Terrestrial species: A lung (a modified mantle cavity).

Open system with a heart (one ventricle and one or two auricles). Includes a radula (a "grater" with chitinous teeth)

Most terrestrial snails (e.g., Grape Snails). Includes a radula (a "grater" with chitinous teeth)

Use high-quality photos of a Grape Snail (Vinogradnaya ulitka) and a Slug (Slizen). Includes a radula (a "grater" with chitinous teeth)

Evolutionarily lost their shells to move into tight spaces.

Part of the food chain; decomposers of organic matter. For Humans: Food source: Escargot (snails). Pests: Slugs damage agricultural crops. Medicine: Source of mucus for cosmetics and research.

Marine predators, some with highly toxic venom. 📂 Slide 6: Ecological and Economic Importance