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.
Pulmonary arteries leaving the right ventricle contain blood low in oxygen, having come from the body to the right half of the heart. When the blood arrives in the lungs, it receives oxygen and loses carbon dioxide, and returns to the left side of the heart in the pulmonary veins.ulmonary arteries leaving the right ventricle contain blood low in oxygen, having come from the body to the right half of the heart. When the blood arrives in the lungs, it receives oxygen and loses carbon dioxide, and returns to the left side of the heart in the pulmonary veins.