Glandular Epithelium
Soft Palate Mucous Acini 400X
Mucous glands of the soft palate illustrate the typical arrangement and shape of the specialized epithelial cells found in tubuloacinar/tuboalveolar glands. Acini are the functional units of these glands. Each acinus is composed of pyramidal-shaped, secretory acini or acinar cells (green arrow). The acinar cells are arranged around a central lumen. The secretory product, mucin, is visible in the acinar cells, and also fills the acinus lumen. Flattened nuclei (yellow arrow) are present in the basal region of the acinar cells.
Sublingual Gland Mucous Acini 400X
The image shows the arrangement of acinar cells (Ac) which compose the mucous acini of the sublingual gland. The secretory acinar cells have pyramidal and trapezoidal shapes. Flattened nuclei (arrow) are present in the basal region of the acinar cells. A central lumen in the acini can be seen. Orange bands of connective tissue separate the acini.
Trachea Goblet Cells 400X Goblet cells (Gc) are seen scattered in the pseudostratified ciliated columnar epithelium of the trachea. Goblet cells are unicellular, mucous-secreting glands. The nuclei (N) and cilia (C) of the pseudostratified cells can be easily identified.
Skin Sebaceous Gland 400X
The photomicrograph shows the secretory acinar cells (arrow) that compose the sebaceous glands in the skin of the scalp. Secretion (S) can be seen emptying into an excretory duct (Ed) near a hair shaft (Hs). Connective tissue (CT) can be seen to the left in the image.
OTHER IMAGES AVAILABLE WITH THE BOOK AND CD-ROM
Parotid Gland – Serous Acinus 400X
Skin – Sweat Glands 100X
Pituitary Gland – Anterior Lobe 400X
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