[edit] Structure Each serous membrane is composed of a secretory epithelial layer and a connective tissue layer underneath. The epithelial layer, known as mesothelium, consists of a single layer of avascular flat nucleated cells (simple squamous epithelium) which produce the lubricating serous fluid.
About MattyB. Matthew David Morris aka MattyB is a 12-year-old pop singer/rapper from Atlanta, GA. He was born on January 6, 2003. Since beginning his music career at age 7, he has quickly become an Internet superstar with more than 2 Billion video views and 5 million YouTube subscribers. His social media consists of over 8 million followers on Facebook & Twitter combined.
Singer who initially gained fame after collaborating with MattyB on a cover of 5 Seconds of Summer's She Looks So Perfect.. She posted her first video, a channel trailer introduction, to her self-titled YouTube channel on April 21, 2015. She already had 20,000 subscribers 3 days later. She and MattyB collaborated again on a cover of Wiz Khalifa's See You Again..