7 Klass Latiushin Shapkin 10 Izdanie - Gotovaia Laboratornaia Rabota 8 Po Biologii

Лабораторные работы по биологии 7 класс - Инфоурок

Based on the 7th-grade biology curriculum by , Laboratory Work No. 8 typically focuses on studying representatives of the class Amphibia (Amphibians) .

Amphibians exhibit "mixed" characteristics: they possess lungs for air-breathing but still rely heavily on moist skin for gas exchange.

Their limb structure and placement allow for movement on land, while webbed feet and a streamlined body make them efficient swimmers.

Examine the front and hind limbs, looking for specialized features like webbed feet for swimming and powerful muscles for jumping.

Note the thin, moist skin and the presence of mucus, which is essential for cutaneous (skin) respiration.