Тип Кольчатые черви | Полный разбор для ОГЭ по биологии | Умскул

👉 Get free, useful files to prepare for the OGE in biology from the pinned Telegram channel: https://t.me/+fde9VVlSCfI5ZjRi I'm Elena Zelenskaya, I prepare for the OGE in biology at the Umskul online school. I've prepared 5,843 students with A's. Thanks to studying at Umskul, I moved from a small village to a city with a population of over a million. Now it's your turn! 🍓 Prepare for the OGE with Umskul now to ensure you get the best grades. Follow the link to sign up or ask a question: https://short.umschool.net/AwVS We'll create a personalized learning track for you in 4 subjects so you don't burn out and get the scores you dream of! With our teachers, you'll definitely understand and love the subject and learn about all the pitfalls of exams. A little about Umskul: — Every eighth student achieving perfect scores in Russia in 2025 studied at Umskul. — We've trained 4,900+ students achieving perfect scores. — 47,000+ of our students have passed the Unified State Exam with a score of 90+. — 80,000+ excellent students have passed the Basic State Exam. — Over 9 years, we've prepared 600,000+ students for the Unified State Exam and Basic State Exam. 🔔 Subscribe to the channel, like it, and click the bell to stay up to date with new videos! 💙 Watch my videos and live broadcasts on VK Video: https://vk.cc/cDHB83 00:00 Introduction 01:24 General characteristics of annelids 02:55 Evolutionary changes 09:40 Digestive system 10:59 Circulatory system in worms 13:12 Nervous system of annelids 14:08 Excretory system 17:35 Reproductive system 18:32 Classification of annelids 18:40 Earthworms and leeches 19:33 Endoparasites 23:14 Conclusion #umskul #oge #biology