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.
What causes chronic constipation? The truth is that we don't always know what causes chronic constipation. When constipation occurs for unknown reasons, it's often referred to as idiopathic.. However, constipation can also occur as a result of several underlying medical conditions or by medications people take. Some of the causes of constipation include diabetes mellitus, hypothyroidism (underactive thyroid), hypercalcemia, amyloidosis, Parkinson's disease, multiple sclerosis, depression, and immobility.