Definition of ravishing written for English Language Learners from the Merriam-Webster Learner's Dictionary with audio pronunciations, usage examples, and count/noncount noun labels. Learner's Dictionary mobile search
In the neck, the thyroid gland is surrounded by a number of other important anatomical structures. Anteriorly (towards the front of the thyroid gland), the gland is covered by muscles of the neck, called the sternohyoid and the sternothyroid muscles.The thyroid gland itself is covered by a capsule made of connective tissue.he carotid sheaths are posterior relations of both the left and the right lobes of the thyroid gland. Further posterior to the carotid sheaths are the vertebrae of the neck, and other nerves, arteries and veins. There are also muscles of the neck, such as the scalene muscles sitting behind the thyroid gland.
Parathyroid Glands. Parathyroid glands are small tissue masses located on the posterior side of the thyroid. These glands vary in number, but typically two or more may be found in the thyroid. Parathyroid glands contain many cells that secrete hormones and have access to extensive blood capillary systems.Parathyroid glands produce and secrete parathyroid hormone. This hormone helps to regulate calcium concentrations by increasing blood calcium levels when these levels dip below normal.Parathyroid hormone counteracts calcitonin, which decreases blood calcium levels.arathyroid glands contain many cells that secrete hormones and have access to extensive blood capillary systems. Parathyroid glands produce and secrete parathyroid hormone. This hormone helps to regulate calcium concentrations by increasing blood calcium levels when these levels dip below normal.