The heart

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

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Sense of balance

The head´s position and movement is sensed by the inner ear.

Glands connected to the duodenum

The pancreas and the liver empty digestive juices into the duodenum.

What is the resolution of the human eye?

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Male reproductive system

The reproductive system consists of organs which work together for the purpose of...

Human muscles

Skeletal muscles form the active part of the locomotor system: they move the bones they...

Limbic system

The limbic system plays an important role in forming emotions and in learning.

Respiratory system

The respiratory system is responsible for the intake of oxygen and the release of carbon...

Circulatory system

Systemic circulation carries oxygenated blood from the heart to the body, while pulmonary...

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