Optical instruments

A wide variety of optical instruments are in use today, ranging from microscopes to telescopes.

Desktop computer

This animation demonstrates the structure and most important peripherals of desktop computers.

Comparison of real fruits and pseudofruits

The pericarp of real fruits develops from the carpel, while the pericarp of pseudofruits develops from other parts of flowers.

Port

Ports must provide necessary infrastructure and services for industry and marine transport.

Airport

Airports provide infrastructure and services necessary for aviation.

Southern wood ant

An ant colony consist of a queen, male ants and workers.

European honeybee

Honeybees produce a sweet and nutritious substance, honey.

Chlorophyll

Chlorophyll is a photosensitive green pigment found in plants; it absorbs light energy, thus plays a vital role in photosynthesis.

Air pollution

This animation demonstrates the main sources of air pollution: agriculture, industry and urban settlements.

Common earthworm

The anatomy of annelids is demonstrated through the example of the common earthworm.

European mole

Moles are small subterranean mammals with modified, spade-like forelegs.

Endocrine system

Glands of the endocrine system secrete hormones into the blood.

Types of surface epithelium

Surface epithelia cover the external and internal surfaces of the body

Gametes

The zygote is the initial cell formed when two gamete cells are joined by means of sexual reproduction.

Mid-latitude cyclone and anticyclone

Cyclones are large areas of circulating air with clouds and precipitation being formed in its centre.

Warm front, cold front

Cold and warm fronts are formed where bodies of cold and warm air meet.

Patellar reflex

The reflex triggered by the stretching of the thigh extensor muscle is the patellar reflex.

Underground waters

Groundwater and aquifers are types of underground waters.

El Niño

A periodic climate pattern that occurs across the tropical Pacific Ocean every five years.

Native American settlement (Crow Nation)

The Crow are Native Americans who inhabited the Yellowstone River valley.

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