The heart lies in the center of the thoracic cavity, also called the mediastinum. It has four chambers, two atria (singular: atrium) and two ventricles. Blood flows through the heart.

What is ultrasound? Ultrasound is a sound wave with a frequency in the megahertz range (between 1 MHz and 1 GHz) which is completely inaudible to humans. The speed sound waves pass through a medium depends on the density of that medium (high frequency ultrasound – superficial structures, low frequency...

Generalized Anxiety Disorder is characterized by persistent and excessive anxiety and worry. Alongside this worry and anxiety people also experience tremendous tension and apprehensive expectation.

What is African swine fever? African swine fever is a deadly animal disease that only appears among porcine species such as pigs and wild boars. African swine fever is not a zoonosis (a disease that may spread among animals and humans and can be transmitted either way) and therefore is not dangerous to human...

What is known about the Nipah virus disease? The Nipah virus (NiV) causes a severe infectious disease in humans and was first isolated and identified in Malaysia and Singapore in September 1998 among pig farmers and people with close pig contacts.

The two adrenal glands of the human body are very important and secrete various hormones.

How is the thyroid gland structured? The thyroid gland surrounds the trachea, just below the larynx. The middle tissue is called the isthmus. It connects the right and the left thyroid lobes.

The spinal cord is of great importance to the nervous system and to the whole body.

What kind of brain regions do we distinguish?

A nerve is a bundle of nerve fibers, which are the axons of the neurons. A nerve connects the CNS with the periphery. Nerves either come from or go to the brain or spinal cord. A nerve is surrounded by connective tissue.