The reflex triggered by the stretching of the thigh extensor muscle is the patellar reflex.
This 3D scene explains the correlation between the ratio of similarity and the ratio of volume of geometric solids.
The mosque, built in a distinctive architectural style, is the largest adobe structure in the world.
Practise the Russian alphabet, build words from letters.
During swallowing food travels from the mouth cavity into the stomach.
This scene explains the structure and functions of the bones.
A fjord is a long, narrow inlet with steep sides, created in a valley carved by glacial activity.
The last Ice Age ended about 13 thousand years ago.
One of the positive influences of the Ottoman invasion of Europe was the construction of baths.
Its architectural solutions and ornamentation rank this mosque among the masterpieces of Islamic art.
The battle of the Greek-Persian War became famous for the heroic sacrifice of the Spartan soldiers.
Every era and every culture has specific residential buildings.
A geyser is a spring characterised by intermittent discharge of water and steam.
The adrenal glands are responsible for maintaining homeostasis and producing a rapid response in stressful situations.
There are two basic cell types: prokaryotic and eukaryotic cells.
NAD⁺ is a coenzyme that plays an important role mainly in catabolic processes, while NADP is important in anabolic processes as hydrogen carriers.
ATP is the main source of energy for cells.
Igloos were the typical dwellings built by Eskimos living in the Arctic zone.
The water supply system provides clean and safe drinking water for the consumers.
The migration of large human populations began in Ancient times.