Предмет: Биология, автор: nastyakotya26

Строение кровеносной системы кольчатых червей.

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Автор ответа: juliajulia665078

2

Ответ:

Кровеносная система замкнутая, состоит из сосудов, часть которых обладает сокращающимися стенками («сердца»), что обеспечивает циркуляцию крови. У некоторых групп кровеносная система отсутствует. Кровь у ряда форм содержит гемоглобин (белок крови красного цвета, содержащий железо и осуществляющий перенос кислорода от органов дыхания к тканям).

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