Heart

Heart
Heart: four-chambered, egg-shaped muscular organ. The central apparatus of blood circulation.
Aortic valve: tissue that prevent blood from flowing backwards in the left ventricle.
Opening of the coronary artery: place where the coronary artery is attached to the heart.
Aorta: principal artery.
Opening of the pulmonary veins: place where the pulmonary veins are attached to the heart.
Left pulmonary arteries: vessels carrying blood from the heart to the left lung.
Left pulmonary veins: vessels carrying blood from the left lung to the heart.
Left atrium: upper left chamber of the heart.
Mitral valve (bicuspid valve): tissue that prevents blood from flowing backward from the left ventricle to the left atrium.
Entry of the aorta: place where the aorta is attached to the heart.
Left ventricle: lower left chamber of the heart.
Interventricular septum: partition separating the ventricles.
Right ventricle: lower right chamber of the heart.
Inferior vena cava: vessel that returns unoxygenated blood to the heart from the lower part of the body.
Triscupid valve: tissue that prevents blood from flowing backward from the right ventricle to the right atrium.
Opening of the coronary vein: place where the coronary vein attaches to the heart.
Right atrium: upper right chamber of the heart.
Semi-lunar pulmonary valve: tissue that prevents the blood from flowing backwards in the right ventricle.
Right pulmonary veins: vessels carrying blood from the right lung to the heart.
Superior vena cava: vessel that returns unoxygenated blood to the heart from the upper part of the body.
Right pulmonary arteries: vessels carrying blood from the heart to the right lung.

Photo :

EN : Tongue lower surface
FR : Langue face inférieure
ES : Lengua cara inferior

Tongue 
          lower surface

Since the tongue contains no bony supports for the muscles, the tongue is an example of a muscular hydrostat, similar in concept to an octopus arm. Instead of bony attachments, the extrinsic muscles of the tongue anchor the tongue firmly to surrounding bones and prevent the mythical possibility of 'swallowing' the tongue.

Animation : Circulatory system


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Objet virtuel : Circulatory system


Thanks to YouTube for allowing us to watch this video.