Effects of Progesterone on the Uterine Lining. Progesterone plays an important part in the menstrual cycle. The menstrual cycle follows a precise pattern governed by the release of different hormones that interact with one another. Progesterone, whose production increases in the second half of the menstrual cycle, plays a pivotal part in preparing the uterine lining for implantation of an embryo. The corpus luteum, the remains of the ovulating follicle, produces progesterone after ovulation.
The pulmonary artery is the vessel transporting de-oxygenated blood from the right ventricle to the lungs. A common misconception is that all arteries carry oxygen-rich blood. It is more appropriate to classify arteries as vessels carrying blood away from the heart.
The blood exchange gases at the lungs' alveoli, and then the blood returns to the heart via pulmonary veins, freshly oxygenated by the alveoli. The pulmonary vein carries the blood to the left atrium, and then the blood is forced into the left ventricle through the mitral valve.lows through the bicuspid valve to the left ventricle. pumped out of the left ventricle through a semi lunar valve into the aorta. branches through series of arteries to all parts of the body. Leaves the body tissues via various veins and re enters the right atrium of the heart via the vena cava.