8 а ) Пресноводная гидра
Короткий видеоурок на тему “Пресноводная гидра“ для учеников 7 класса по биологии.
Внешний вид и поведение. Внутреннее строение. Двухслойность. Эктодерма и энтодерма. Разнообразие клеток. Питание гидры. Дыхание. Раздражимость. Размножение гидры. Регенерация. Значение в природе.
Больше видеоуроков по школьной программе смотрите на портале онлайн-образования:
#биология7класс #пресноводнаягидра
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