Physiology is the study of the functions of living organisms. It is divided into many branches.
Physiology is derived from a Greek word with a Latin equivalent, Physiologia, meaning “natural knowledge”. Physiology is the branch of science that deals with the functions of the body and how these functions occur and are controlled. It also describes which organs initiate and maintain these functions.
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Understanding the Thyroid Gland: Functions and Anatomy
The thyroid gland is a butterfly-shaped endocrine gland located superficially in the neck. It consists of two lobes, the right and left lobes, connected in the lower two-thirds by a thin band of tissue known as the isthmus.
Gastrin: A Gastrointestinal Hormone
Gastrointestinal hormones are biologically active polypeptides secreted from the endocrine cells of the GIT mucosa. These hormones enter the portal circulation, then flow into the systemic circulation, and finally reach the target tissue. Some gastrointestinal hormones also function as paracrine and autocrine hormones to regulate gastrointestinal (GI) functions. They are chemical messengers.
