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.
Although oil continued to be Spain's major source of energy, it had diminished in importance significantly since 1973. Oil consumption grew steadily between 1973 and 1979, reaching 50 million tons in that last year, but by 1985 it had declined to 39 million tons.