Blood vessels

Blood vessels
Blood vessels: organic conduits carrying blood to the heart and organs.
Connective tissue: tissue that connects and supports.
Smooth muscle tissue: smooth muscle.
Endothelium: cellular tissue covering the wall of an artery.
Epithelial cell: cell of the endothelium.
Valve: tissue that prevents the blood from flowing backwards.
White blood cell: free-floating blood cell that plays an important role in the immune system.
Red blood cell: free-floating blood cell that carries nutriments to the organs.
Capillary: small blood vessel that connects arteries to veins and allows exchange with the cells.
Vein: blood vessel that carries blood from the organs to the heart.
Artery: blood vessel that carries blood from the heart to the organs.

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.