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.
The Nation Expands. Texas Annexation, 1845. The Spanish were the first to colonize the states that today make up the American southwest, including the state of Texas. In the waning years of the Spanish empire, in the early 19th century, Spain decided to allow some Americans to settle in Texas. In 1821 Moses Austin obtained permission to lead a group of 300 American families in creating a new settlement there.