Chemical Messengers 3. Hormones â¢Longârange messengersâ¢Secreted into blood by endocrine glands in response to appropriate signalâ¢Exert effect on target cells some distance away from release site 4.hemical Messengers 3. Hormones â¢Longârange messengersâ¢Secreted into blood by endocrine glands in response to appropriate signalâ¢Exert effect on target cells some distance away from release site 4.
Scale box in millimeters. Vesicular texture is a volcanic rock texture characterized by a rock being pitted with many cavities (known as vesicles) at its surface and inside.
The pseudostratifiedcolumnar epithelium in seminal vesicles is surrounded by thick fibromuscular tissue. The vesicle epithelium is composed of columnar and basal epithelial cells. The columnar epithelium typically contains large amounts of lipofuscin pigment.An unusual feature of normal epithelial cells is the feature of cellular atypia.However, atypical cells are often encountered in the seminal vesicle epithelium, where epithelial cells with large atypical nuclei often are present.he seminal vesicles are paired, highly coiled, tubular structures located above the prostate and behind the urinary bladder. The seminal vesicles merge with vas deferens before debouching into the intra-prostatic urethra.