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.
Latvian is a Baltic language related to Lithuanian and Old Prussian with about 1.4 million speakers in Latvia.There are also Latvian speakers in the USA, Russia, Australia, Canada, Germany, the UK, Sweden, Lithuania, Ukraine, Estonia, Brazil and Belarus.he first Latvian dictionary, Lettus, was compiled by Georg Mancelius in 1638. The German monks who wrote these texts used a version of the the Fractur alphabet adapted from German which was ill suited to the Latvian language.