Synaptic transmission

Neurons transmit electrical signals via chemical and electrical synapses.

Muscle tissues

The three types of muscle found in the human body are the smooth, the striated and the cardiac muscle.

Nose, the mechanism of smelling

Olfactory receptors produce electric signals when stimulated by odors.

Parts of the human brain

The main parts of the human brain are the brain stem, the cerebellum, the diencephalon, and the cerebrum, which is divided into lobes.

Mechanism of taste reception

Taste receptors convert chemical stimuli into electric signals.

Layers of the skin; cutaneous senses

The skin is the soft outer covering of our body, its three layers are the epidermis, the dermis and the hypodermis.

Nervous system

The central nervous system consists of the brain and the spinal cord, the peripheral nervous system consists of nerves and ganglia.

The human brain

The main parts of the human brain are the brain stem, the cerebellum, the diencephalon, and the cerebrum.

Connective tissues

Connective tissues include loose and dense connective tissues, adipose tissue, blood, tendon and bone tissue.

Greenhouse effect

Human activity increases the greenhouse effect and leads to global warming.

Ozone layer

The ozone layer filters the Sun´s harmful UV radiation, therefore it is indispensable for life on Earth.

The Earth’s magnetic field

The Earth’s magnetic North and South poles are located near the geographic North and South poles.

Anatomy of the small intestine

The longest part of the digestive system, where most of the digestion and absorption takes place.

Formation of stratovolcanoes

Stratovolcanoes consist of layers of volcanic ash, debris and lava.

Ancient Roman domus

Wealthy citizens in ancient Rome owned large houses with varied layouts of several rooms.

Melk Abbey (Austria)

The 900 years old Benedictine abbey is situated in Melk, on the right bank of the Danube.

Ancient Greek house

The average house in Ancient Greece had a rectangular, geometrical floor plan and two stories.

Life cycle of mosses and ferns

This animation compares the life cycles of mosses and ferns, helping to understand the general life cycle of plants.

Transparency

This animation explains transparency and opacity, the principle of radiography, and the light-absorbing properties of materials.

Daguerreotype

The first commercially successful technique of photography was invented by the French Louis Daguerre.

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