Glandular tissues produce chemical substances. According to the Davidson College Biology Department, many glandular tissues secrete hormones, but others secrete substances such as sebum, saliva and vaginal lubrication. There are two categories of glandular tissue. Endocrine tissue releases substances into the bloodstream, and substances secreted by exocrine tissues travel through ducts to reach the body's outer surface or interior cavities such as the mouth and vagina.Know More
The University of Leeds Histology Guide states that endocrine glands include the adrenal glands, thyroid, thymus and pituitary glands. Secretions made by these glands pass directly into the bloodstream. Exocrine secretions, such as those produced by the sweat, salivary and mammary glands, pass through ducts to reach their final destination.
Exocrine glandular tissue produces one of three secretion types. Sebaceous tissue produces sebum, a white, oily substance that lubricates the skin and traps moisture beneath its surface. The ducts through which sebum passes are called pores. Mucous tissues secrete heavy, viscous liquids such as the mucosal lining of the stomach. Mucous tissues are vital because they protect other delicate tissues from harsh substances such as stomach acid. The third type of exocrine glandular secretions is serous fluids, which are thin and watery. Saliva is an excellent example, although it also contains tiny amounts of mucous. Serous fluid is also an important component of blood.Learn more in Glands & Hormones
The pituitary gland is a small structure that is located at the base of the posterior brain. It is directly below the hypothalamus and is attached to the hypothalamus by nerve fibers.Full Answer >
As stated by WebMD, signs of an underactive thyroid, or hypothyroidism, include feeling tired, sluggish or weak, coarse and thinning hair, an inability to tolerate cold, memory problems, depression and difficulty concentrating. The most common cause of hypothyroidism in the United States is Hashimoto's thyroiditis, in which the immune system attacks the thyroid.Full Answer >
The jugulodigastric lymph node is a prominent lymph node in the deep lateral cervical group located behind the mandible, lying below the posterior belly of the digastric muscle and anterior to the internal jugular vein. The node receives lymphatic drainage from the pharynx, palatine tonsil, and tongue, according to medilexicon.com.Full Answer >
The thyroid gland is a crucial hormonal gland that plays an important role in growth and development, metabolism and regulating several functions of the human body such as temperature and calcium balance. It constantly secretes, stores and releases multiple hormones, collectively referred to as thyroid hormones.Full Answer >