connective The outer layer of a blood vessel (artery or vein) is called the tunica externa or tunica adventitia.See http://training.seer.cancer.gov/module_anatomy/unit7_3_ca â¦ rdvasc_blood1_classification.html pericardium is the layer of the blood vessel that is made of tough  connective tissue.onnective The outer layer of a blood vessel (artery or vein) is called the tunica externa or tunica adventitia.
As of June 2000, the fastest running human is Michael Johnson, the American track and field star who on August 1, 1996 set the world record of running 200 meters in 19.32 seconds.
Given those titles, many consider her to be the fastest woman in the world. Fraser-Pryce's personal best time in the 100-meter dash was set in June 2012 in Kingston, Jamaica. She completed the race that day in a blistering 10.70 seconds. Given that time, however, Fraser-Pryce is not the fastest woman in history. American Carmelita Jeter, who finished second to Fraser-Pryce at the London Olympics, has a personal best time of 10.64 seconds in the 100-meter dash. While extremely fast, Jeter is also not the fastest woman in history. That title belongs to the one and only Florence Griffith-Joyner. Known as âFlo-Jo by her many fans, Griffith-Joyner still holds the all-time world record in the 100-meter dash at 10.49 seconds set in 1988.