Skachat Besplatno Prezentatsii Po Biologii 7 Klass Briukhonogie Molliuski May 2026

Open system with a heart (one ventricle and one or two auricles).

Lives in freshwater, breathes atmospheric air.

Features eyes and one or two pairs of tentacles (sensory organs). Open system with a heart (one ventricle and

Include a labeled drawing of the Radula and the Internal Organs .

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. Include a labeled drawing of the Radula and

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.

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. Provide a script for what to say while presenting

Provides protection; can be coiled (right or left-handed) or reduced (as in slugs). 📂 Slide 3: Internal Anatomy