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.
During menopause and menstruation hormonal and lifestyle changes can cause constipation. Stress. constipation can be caused by stress, and vice versa stress can also be a symptom of constipation. Aging. Bodily functions slow down with age and the digestive system is also part of it.