1 The portion of the brain that maintains the bodyâs internal balance (homeostasis). 2  The hypothalamus is the link between the endocrine and nervous systems. 3  The hypothalamus produces releasing and inhibiting hormones, which stop and start the production of other hormones throughout the body.
In the mid-19th century the Industrial Revolution began to change Spain. The first railway in Spain was built in 1848 and by the 1860s railways had spread across Spain. Mining and the iron and steel industries in Spain grew in the late 19th century.
Emigration of Spanish workers to the more industrialized countries of Western Europe, notably to the Federal Republic of Germany (FRG), France, Switzerland, and Belgium, increased markedly during the 1960s, but since 1973 the number of Spaniards returning to Spain has been greater than the number of those leaving.