Eukaryotic cells with nuclei measuring only a few micrometres may contain nearly 2 metres of DNA, coiled multiple times.
Systemic circulation carries oxygenated blood from the heart to the body, while pulmonary circulation carries oxygenated blood from the lungs to the heart.
This animation demonstrates the fine molecular structure and mechanism of muscles.
The large intestine is the last section of our digestive track.
Olfactory receptors produce electric signals when stimulated by odours.
The liver is a vital organ that plays an important role in the digestion of fats, detoxification and metabolism.
The curvature of the lens of the eye changes when we look at a distant or at a near object, to ensure a sharp image.
Humans have 4 types of teeth: incisors, canines, premolars and molars.
This scene summarizes the main organs of the human body.
Bones of the upper limbs form the pectoral girdle and the arms.
Human blood consists of blood cells and plasma.
This animation demonstrates the development of the human embryo and foetus.
The ribs, the sternum and the spinal column form the skeleton of the chest.
Lymph vessels carry lymph to the blood vessels, while lymph nodes are integral parts of the immune system.
The pancreas and the liver empty digestive juices into the duodenum.
The eye is one of our most important sense organs. When stimulated by light, electric impulses are produced by its receptors.
This animation demonstrates the parts of the head, the torso and the limbs.
The respiratory system is responsible for the intake of oxygen and the release of carbon dioxide.
Neurons transmit electrical signals via chemical and electrical synapses.
The heart generates the electrical impulses necessary for its own operation. The graphic representation of the electrical activity of the heart is the...