System that satisfies consumers’ demands of water supply, wastewater disposal, electricity, heat and gas supply and telecommunication.
Chlorophyll is a photosensitive green pigment found in plants; it absorbs light energy, thus plays a vital role in photosynthesis.
Honeybees produce a sweet and nutritious substance, honey.
An ant colony consist of a queen, male ants and workers.
Two meshing gears transmit torque during their rotational motion.
Types of bridges include beam-, arch-, suspension-, cantilever and truss bridges.
A presentation of the major administrative units of China.
A species of mollusc widespread in freshwaters.
Common ciliated eucaryotic unicellular organisms widespread in freshwaters.
A type of snake with a characteristic spot on its neck.
Red deer are even-toed ungulates, ruminants. Their males have spectacular antlers.
The large white butterfly is a common species of butterflies, through which we demonstrate the anatomy of butterflies.
The cockchafer (or maybug) is a widespread bug in Europe. Its larvae, known as chafer grubs are considered a pest.
Moles are small subterranean mammals with modified, spade-like forelegs.
The anatomy of annelids is demonstrated through the example of the common earthworm.
This animation demonstrates how horse chestnut trees change throughout the seasons
Jellyfish are free-swimming marine animals, a species of Cnidaria, the most ancient group of Eumetazoans.
The most ancient group of animals, they live underwater, lack real tissues and body symmetry.
Widespread heterotrophic unicellular organisms with constantly changing shapes
This animation demonstrates the anatomy of amphibians through the example of a common species of frogs.