The wall of the heart is composed of three distinct layers. 2. The outermost layer, the epicardium, is made up of connective tissue and epithelium, and houses blood and lymph capillaries along with coronary arteries. 3. The middle myocardium consists of cardiac muscle and is the thickest layer of the heart wall. 4. The inner endocardium is smooth and is made up of connective tissue and epithelium, and is continuous with the endothelium of major vessels joining the heart. a. The endocardium houses Purkinje fibers.
Lithuanian is the official language of Lithuania and is spoken by about 4 million native speakers. The language belongs to the Baltic branch of the Indo-European family. Researchers of Indo-European languages say Lithuanian is the most archaic of all the living Indo-European tongues.
Justina's right about the younger people being better speakers of English in Lithuania. At least bring a dictionary. It's a great country and the people are generally fantastic. I teach English in a provincial Lithuanian Secondary School. You will have no problem in the big cities. Elsewhere try the under thirties. The older ones will be more proficient in Russian though, with the amount of Lithuanians working abroad, you'll find someone who can get by, even in a village.