Skachat Besplatno Prezentatsii Po Biologii 7 Klass Briukhonogie Molliuski (2025)

Ask the class why a snail leaves a "slime trail" (Answer: To reduce friction and protect the foot). If you'd like, I can help you: Write a quiz for the final slide. Provide a script for what to say while presenting. Find specific Latin names for the species mentioned.

Evolutionarily lost their shells to move into tight spaces. Ask the class why a snail leaves a

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. Find specific Latin names for the species mentioned

Open system with a heart (one ventricle and one or two auricles). For Humans: Food source: Escargot (snails)

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

Many marine species (separate males and females). Fertilization: Usually internal. Development: Direct (small snails hatch from eggs). Indirect (larval stage in some marine species). 📂 Slide 5: Diversity of Gastropods Grape Snail: A common land herbivore.

A broad, flat sole used for crawling via muscular waves.