Shingles, also known as zoster or herpes zoster, is a painful skin rash caused by the same virus responsible for chicken pox: the varicella zoster virus. Even if you had chicken pox in the past, you can still contract shingles.aused by the herpes virus, the earliest symptoms of both conditions include headache, fever, a general feeling of malaise, sore throat and swelling of the face. Chicken pox is very common in children, being actually a children's disease. It is very contagious and it is actually nothing but a viral infection.
The pulmonary vein is the vessel transporting oxygen-rich blood from the lungs to the left atrium. A common misconception is that all veins carry de-oxygenated blood. It is more appropriate to classify veins as vessels carrying blood to the heart.
Oxygenated blood returns to the left atrium via four pulmonary veins. It travels through the mitral (bicuspid) valve into the left ventricle. During ventricular contraction, the blood from this chamber exits through the aortic semilunar valve into the aorta and out to the systemic circulation (Fig. 22-4). Key Concept The pulmonary arteries are the only arteries in the body that carry deoxygenated blood.