The pancreas and the liver empty digestive juices into the duodenum.
Lymph vessels carry lymph to the blood vessels, while lymph nodes are integral parts of the immune system.
Eukaryotic cells contain a number of organelles.
The ribs, the sternum and the spinal column form the skeleton of the chest.
Bacteria occur in a wide range of shapes, including spheres, rods and spirals.
The animation shows the traditional Japanese wooden townhouse, the machiya.
Due to the Earth´s tilted axis, the angle of the Sun's rays at given latitudes continuously changes during the year.
While generators convert mechanical energy into electrical energy, electric motors convert electrical energy into mechanical energy.
Physical properties, as well as the flora and fauna of the ocean change with depth.
This animations demonstrates the exterior and interior construction of cars, as well as their operation.
The animation demonstrates the different flower types of angiosperms.
Built in Neo-Byzantine style, this Orthodox cathedral is one of the symbols of the Bulgarian capital city.
A type of steam locomotives used by British Railways were manufactured in the 1950s.
The step pyramid, built in the 27th century BC, was the first pyramid in Egypt.
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.
The geographic coordinate system enables every location on the Earth to be exactly specified.
The orbits of the 8 planets in our Solar System are elliptical.
The Benz Patent-Motorwagen is widely regarded as the first vehicle propelled by an internal combustion engine.
The world famous monument in England still poses mysteries for archaeologist.
This Pacific island is famous for its unique monolithic human figures.