However, the red-yellow pheomelanin is believed to cause the warm, golden, or auburn tones found in some types of brown hair. The range of colors produced by melanins is limited to shades of yellow, brown, red, and black. Grey hairs contain only a few melanin granules, spread out through the hair.
Hormones are your body's chemical messengers. They travel in your bloodstream to tissues or organs. Endocrine glands, which are special groups of cells, make hormones. The major endocrine glands are the pituitary, pineal, thymus, thyroid, adrenal glands, and pancreas. In addition, men produce hormones in their testes and women produce them in their ovaries.
Connective tissue holds the body together and plays a role in its growth and development. Because connective tissue is found throughout the body, Marfan syndrome and related disorders can affect many parts of the body, including the heart and blood vessels, bones and joints, eyes, skin, and lungs. Below is a short summary of Marfan syndrome features.