Your heart is one of the most important muscles in your body. Each day, your heart beats about 100,000 times and, over your life span, about 2.5 billion times! The fibrous pericardium encases, protects and secures the heart. Inside the pericardium is the heart wall, and this is organized into three main layers. The outermost layer of the heart wall is the epicardium, which is also the innermost layer of the pericardium.
Several different languages are spoken in Mexico, with a large majority of the population fluent in Spanish while some indigenous Mexicans are monolingual in indigenous languages.he slow process of replacing Mexico's indigenous languages with Spanish began with the arrival of Spanish forces and colonists in Mexico in the 16th century.
The diets of middle-and upper-income Mexicans are more closely aligned with diets of Americans and Europeans and include a wide variety of food items prepared in wide range of culinary styles. Mexico is known for its tequila, which is made from agave cactus that is well suited to the climate of central Mexico.anguages of Mexico. The overwhelming majority of Mexicans today speak Spanish. According to the CIA, Spanish is spoken by 92.7 percent of the Mexican population. About 6 percent of the population speaks Spanish and indigenous languages, such as Mayan, Nahuatl and other regional languages.