Color blindness is not a form of blindness at all, but a deficiency in the way you see color. With this vision problem, you have difficulty distinguishing certain colors, such as blue and yellow or red and green.Color blindness (or, more accurately, color vision deficiency) is an inherited condition that affects males more frequently than females.According to Prevent Blindness America, an estimated 8 percent of males and less than 1 percent of females have color vision problems.ed-green color deficiency is the most common form of color blindness. Much more rarely, a person may inherit a trait that reduces the ability to see blue and yellow hues.
5. Ascending aorta, right aortic arch, left aortic arch, connecting to the descending aorta. 6. A vascular ring involves the aorta, its branches and sometimes remnants of vascular structures forming a ring around trachea and esophagus. A vascular sling involves the pulmonary artery.
1 Longitudinal smooth muscle fibers are present in the posterior trachea between the ends of the cartilage rings. 2  This smooth muscle tissue allows the trachea to adjust its diameter as needed. 3  Surrounding the submucosa is a layer of hyaline cartilage that forms the supportive rings of the trachea.lick to read more below. The trachea (or windpipe) is a wide, hollow tube that connects the larynx (or voice box) to the bronchi of the lungs. It is an integral part of the bodyâs airway and has the vital function of providing air flow to and from the lungs for respiration.