The right ventricle then pumps blood through the pulmonary artery into the lungs. 4. In the lungs, tiny blood vessels called capillaries absorb carbon diox-ide from the blood and replace it with oxygen. 5. Oxygenated blood then flows through the pulmonary vein and into the left atrium. 6.
It is this hormone progesterone that can affect your digestive system by delaying the transit time of food through the intestines and hence may lead to constipation before your period. Usually though, you should find that the period-related constipation eases with the start of menstruation.
Some drugs for pain, depression, high blood pressure, and Parkinson's disease are linked to constipation. Tell your doctor whatâs going on. You may be able to take something else. Calcium and iron supplements, especially if you also take something else that affects your stool, can also cause problems.