Of the hemlocks, only western hemlock (Tsuga heterophylla) challenges the mature height of the majority of fir trees. Mountain hemlock grows between 125 and 175 feet in the Pacific Northwest, while the rest of the hemlocks are in the 50- to 100-foot range. Many fir species, such as white fir (Abies concolor) and noble fir (Abies procera), commonly grow between 100 and 150 feet tall.
A single organ or multiple organs and tissues may be affected. There are many autoimmune diseases with symptoms that range from mild rashes to life-threatening conditions that attack major organ systems. Though each disease is different, immune-system malfunction is present in all of them.rgans and tissues frequently affected include the endocrine gland, such as thyroid, pancreas, and adrenal glands; components of the blood, such as red blood cells; and the connective tissues, skin, muscles, and joints. In organ-specific disorders, the autoimmune process is directed mostly against one organ.
Adult stem cells have been identified in many organs and tissues, including brain, bone marrow, peripheral blood, blood vessels, skeletal muscle, skin, teeth, heart, gut, liver, ovarian epithelium, and testis. They are thought to reside in a specific area of each tissue (called a stem cell niche).he adult stem cell can renew itself and can differentiate to yield some or all of the major specialized cell types of the tissue or organ. The primary roles of adult stem cells in a living organism are to maintain and repair the tissue in which they are found.