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.
and a small middle class. Industrialization came relatively late to Spain and was concentrated in few areas. The social structure was polarized between a small upper class, consisting fundamentally of large landowners (latifundia) and a large rural proletariat (jornaleros).