Glands connected to the duodenum

The pancreas and the liver empty digestive juices into the duodenum.

Lymphatic system

Lymph vessels carry lymph to the blood vessels, while lymph nodes are integral parts of the immune system.

The bones of the thorax

The ribs, the sternum and the spinal column form the skeleton of the chest.

Bacteria (spheres, rods, spirals)

Bacteria occur in a wide range of shapes, including spheres, rods and spirals.

Traditional Japanese house (Machiya)

The animation shows the traditional Japanese wooden townhouse, the machiya.

Change of seasons (intermediate)

Due to the Earth´s tilted axis, the angle of the Sun's rays at given latitudes continuously changes during the year.

Generators and electric motors

While generators convert mechanical energy into electrical energy, electric motors convert electrical energy into mechanical energy.

Layers of the ocean

Physical properties, as well as the flora and fauna of the ocean change with depth.

Construction of cars

This animations demonstrates the exterior and interior construction of cars, as well as their operation.

The flowers of angiosperms

The animation demonstrates the different flower types of angiosperms.

Saint Alexander Nevsky Cathedral (Sofia, 20th century)

Built in Neo-Byzantine style, this Orthodox cathedral is one of the symbols of the Bulgarian capital city.

BR Standard Class 3 2-6-2T steam locomotive

A type of steam locomotives used by British Railways were manufactured in the 1950s.

Pyramid of Djoser (Saqqara, 27th century BC)

The step pyramid, built in the 27th century BC, was the first pyramid in Egypt.

Marie Curie's laboratory

Marie Curie, the only person to win the Nobel Prize in two different sciences, is probably the most famous woman in the history of science.

Geographic coordinate system

The geographic coordinate system enables every location on the Earth to be exactly specified.

The Solar System; planetary orbits

The orbits of the 8 planets in our Solar System are elliptical.

Patent-Motorwagen (Karl Benz, 1886)

The Benz Patent-Motorwagen is widely regarded as the first vehicle propelled by an internal combustion engine.

Stonehenge (Great Britain, Bronze Age)

The world famous monument in England still poses mysteries for archaeologist.

Moai (Easter Island, 16th century)

This Pacific island is famous for its unique monolithic human figures.

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