The heart

The heart is the central pump of the cardiovascular system beating several billion times over our lifetime.

Evaporation and boiling

What happens in a liquid during evaporation and boiling? What does its boiling point depend on?

Gravitational waves (LIGO)

Massive accelerating or orbiting bodies cause ripples in spacetime. These are called gravitational waves.

DNA

Carrier of genetic information in cells.

The mechanism of taste reception

Taste receptors convert chemical stimuli into electric signals.

Diocletian's Palace (Split, Croatia)

The fortress-like palace was built by Roman Emperor Diocletian on the coast near his home town.

Characteristics of sound waves

This animation explains the most important characteristics of waves through sound waves.

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.

Oral cavity, pharynx and oesophagus

The first section of the gastrointestinal tract comprises the oral cavity, the pharynx and the oesophagus.

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.

Types of waves

Waves play an extremely important role in many areas of our lives.

Navigational instruments of the past

Several ingenious instruments have been invented over the centuries to help in navigating the seas.

Anatomy of the small intestine

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

The development of lakes

Standing bodies of water can form in depressions on the surface by both endogenic and exogenic forces, as well as by human activity.

The Panama Canal

The Panama Canal is an artificial waterway created to shorten shipping routes between the Pacific Ocean and the Atlantic Ocean.

Voice production

When producing sound, the vocal cords are vibrated by the air flowing out of the lung.

Nervous system

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

Organisation of genetic material

Eukaryotic cells with nuclei measuring only a few micrometres may contain nearly 2 metres of DNA, coiled multiple times.

Earthquake

An earthquake is one of the most devastating natural phenomena.

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