Jellyfish

Jellyfish are free-swimming marine animals, a species of Cnidaria, the most ancient group of Eumetazoans.

Grass snake

A type of snake with a characteristic spot on its neck.

What is the time?

A game to practise the use of analogue and digital clocks.

Two-stroke engine

A two-stroke engine is a type of internal combustion engine with a cycle of only two (power) strokes.

Medieval Chinese Emperor

The Emperor of the vast Far-Eastern empire was the lord of life and death.

Blood vessels

The three main types of blood vessels in the human body are the arteries, the veins, and the capillaries.

Oil molecule

Triglycerides containing unsaturated fatty acids are liquid at room temperature.

Location of origin of livestock and crops

Domesticated animals and crops originate from various parts of the world.

Soil pollution

This animation demonstrates the main sources of soil pollution.

Common earthworm

The anatomy of annelids is demonstrated through the example of the common earthworm.

Secondary structure of proteins

Polypeptide chains are composed of amino acids and can appear in alpha-helix or beta-sheet form.

Endocrine system

Glands of the endocrine system secrete hormones into the blood.

Freshwater pearl mussel

A species of mollusc widespread in freshwaters.

String quartet

A string quartet consists of four string players, it appeared in the late 18th century.

Gametes

The zygote is the initial cell formed when two gamete cells are joined by means of sexual reproduction.

European mole

Moles are small subterranean mammals with modified, spade-like forelegs.

Patellar reflex

The reflex triggered by the stretching of the thigh extensor muscle is the patellar reflex.

Viking chieftain (10th century)

Viking leaders were elected from tribe members by the right of blood or an act of bravery.

Magnetron

One of the most important components of the microwave oven is the magnetron, which produces the microwaves.

Daedalus and Icarus

An ancient Greek myth about the tragedy of father and son who wanted to flee the island of Crete.

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