A new study by skin experts in Tallinn, Estonia shows that human chronological age can be assessed with artificial ...

the researchers identified elongate structures running along the ventral side of these ancient organisms. "These structures closely resemble the ventral nerve cords seen in modern priapulids ...

and fourth dorsal fin motor neurons, which are located in the ventrolateral zone (lower side) of the ventral horn. "This is an extremely rare case in which motor neurons for the illicium were ...