When producing sound, the vocal cords are vibrated by the air flowing out of the lung.
African villages adapt to the natural environment well and reflect of the culture of local tribes.
Mechanical bell that functions by means of an electromagnet.
Practice the Hungarian alphabet and form words from the letters.
This animation demonstrates the most important relief features, surface waters and their relevant symbols.
Nuclear power plants convert the energy released during nuclear fission into electric power.
The Panama Canal is an artificial waterway created to shorten shipping routes between the Pacific Ocean and the Atlantic Ocean.
The heart is the central pump of the cardiovascular system beating several billion times over our lifetime.
The skin is the soft outer covering of our body, its three layers are the epidermis, the dermis and the hypodermis.
The central nervous system consists of the brain and the spinal cord, the peripheral nervous system consists of nerves and ganglia.
The longest part of the digestive system, where most of the digestion and absorption takes place.
A type of large freshwater crayfish widespread in Europe.
Connective tissues include loose and dense connective tissues, adipose tissue, blood, tendon and bone tissue.
The main parts of the human brain are the brain stem, the cerebellum, the diencephalon, and the cerebrum.
Taste receptors convert chemical stimuli into electric signals.
The main parts of the human brain are the brain stem, the cerebellum, the diencephalon, and the cerebrum, which is divided into lobes.
Olfactory receptors produce electric signals when stimulated by odours.
The three types of muscle found in the human body are the smooth, the striated and the cardiac muscle.
This animation demonstrates the fine molecular structure and mechanism of muscles.
Neurons transmit electrical signals via chemical and electrical synapses.