Your skeletal system isn't just your bones; it's your bone marrow, cartilage, and ligaments all make up this important body system. As an embryo, you are made up almost completely of cartilage. Cartilage is tough, yet elastic connective tissue. As the embryo develops, the cartilage is replaced with bone.
Synopsis. 1  Alex Katz is a New York based painter and printmaker, specializing in boldly simplified portraits and landscapes. Though influenced by American Scene artists as well as diverse elements of European and American modernism, he has avoided affiliation with any group or movement.
Publication history. Alex Wilder was created by author Brian K. Vaughan and artist Adrian Alphona where debuted in Runaways vol. 1 #1 with most of the other main characters. Like every member of the original Runaways, he is the son of evil villains with special abilities; in Alex's case, gang mob bosses. Alex is the team's de facto leader in the title's first volume. Unlike the rest of the team, Alex does not possess powers of any kind but is a child prodigy in the fields of logic and strategy, both of which assist Alex greatly during his time as leader.