Definition

Noun: - The anterior part of the anterior pituitary gland: In endocrinology, 'pars distalis' refers to the largest, glandular, anterior portion of the adenohypophysis (anterior pituitary). It is the primary site for the synthesis and secretion of several key hormones that regulate other endocrine glands and bodily functions.

Usage

The term 'pars distalis' is a specialized anatomical and histological term used primarily in medical, biological, and endocrinological contexts. - The secretory cells of the pars distalis produce hormones like growth hormone and prolactin. - Under the microscope, the pars distalis can be distinguished from the pars tuberalis and pars intermedia of the pituitary.

Advanced Usage

• Histological identification: The pars distalis is characterized by the presence of acidophils and basophils, which are types of hormone-secreting cells.
  • The stain clearly differentiated the chromophobe cells in the pars distalis.

Variants and Related Words

• Adenohypophysis (n): The entire anterior lobe of the pituitary gland, which includes the pars distalis, pars tuberalis, and pars intermedia.
• Pars intermedia (n): A thin region of the anterior pituitary between the pars distalis and the posterior pituitary (neurohypophysis).
• Pars tuberalis (n): A sheath of cells that wraps around the pituitary stalk, part of the anterior pituitary.

Synonyms

• Anterior lobe (of the pituitary gland): While 'anterior lobe' is a broader term often used synonymously with 'adenohypophysis', in precise anatomical discussion, the 'pars distalis' constitutes the major, functional part of this lobe.

Noun

1. the anterior part of the anterior pituitary