The spinal cord is the part of the central nervous system running inside the spinal column from which spinal nerves branch out.
The central nervous system consists of the brain and the spinal cord, the peripheral nervous system consists of nerves and ganglia.
The ancient city of Babylon was built on the banks of the Euphrates River in Mesopotamia.
When producing sound, the vocal cords are vibrated by the air flowing out of the lung.
The longest part of the digestive system, where most of the digestion and absorption takes place.
Connective tissues include loose and dense connective tissues, adipose tissue, blood, tendon and bone tissue.
Taste receptors convert chemical stimuli into electric signals.
This animation shows the symptoms and treatment of secretory otitis media.
The position and acceleration of the head is detected by the inner ear.
The main parts of the human brain are the brain stem, the cerebellum, the diencephalon, and the cerebrum, which is divided into lobes.
Today only one of the Wonders of the Ancient World is still intact: the Pyramids of Giza.
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.
A Zeppelin is a type of rigid-framed airship.
The Doric, Ionic and Corinthian order of columns are different in size and ornamentation as well.
This Pacific island is famous for its unique monolithic human figures.
This animation presents the main types of leaves and the differences between monocot and dicot leaves.
Bacteria occur in a wide range of shapes, including spheres, rods and spirals.