The endocardium is the innermost layer of tissue that lines the chambers of the heart. Its cells are embryologically and biologically similar to the endothelial cells that line blood vessels. The endocardium also provides protection to the valves and heart chambers.
In 2002, there were five sisters living in the Duggar house: Jana, then 12; Jill, 11; Jessa, 10; Jinger, 9; and Joy-Anna, 5. In March 2003, Jim Bob met with âchurch eldersâ to discuss Joshâs behavior, and they decided Josh needed to enter a treatment program.
1 The 28-year-old niece of notoriously-strict family patriarch Jim Bob Duggar married her fiance Dillon King on Sunday evening.  Unlike her cousins, Jessa and Jill, who both covered their shoulders and chests in modest bridal gowns, Amy opted for a more risque design.