Question

Какие системы органов впервые появляются у кольчатых червей?

Answer 1

Кровеносная сис-ма(замкнутая), нервная сис-ма (не ароморфоз, но она теперь узловая), у них появилась только две - кровеносная сис-ма и дыхательная си-ма
В пищеварительной появился ЗОБ(дозатор), у дождевых червей есть особые известковые железы. Они продуцируют секрет, который нейтрализует кислую почву.

Answer 2

Systems of Organs in Annelid Worms

Annelid worms, also known as segmented worms, are characterized by the presence of segmented bodies and various organ systems. The first appearance of organ systems in annelid worms can be attributed to their segmented nature and evolutionary development.

Digestive System: The digestive system is one of the primary organ systems that first appear in annelid worms. It includes the mouth, pharynx, esophagus, crop, gizzard, and intestine. The digestive system allows annelid worms to process and absorb nutrients from their environment.

Circulatory System: Annelid worms have a closed circulatory system, which is a significant evolutionary development. This system consists of blood vessels and a pumping organ, often referred to as a heart. The circulatory system facilitates the distribution of nutrients and oxygen throughout the worm's body.

Nervous System: The nervous system in annelid worms is another vital organ system. It includes a brain, nerve cords, and ganglia. This system enables annelid worms to respond to stimuli and coordinate various bodily functions.

Reproductive System: The reproductive system is also present in annelid worms. It includes both male and female reproductive organs, allowing for sexual reproduction. Annelid worms can reproduce through the release of eggs and sperm into the environment.

In summary, the first appearance of organ systems in annelid worms includes the digestive, circulatory, nervous, and reproductive systems, which are essential for their survival and functioning within their environment.