1 Oxygen: Specialized nerve cells within the aorta and carotid arteries called peripheral chemoreceptors monitor the oxygen concentration of the blood and feed back on the respiratory centers. 2  If the oxygen concentration in the blood decreases, they tell the respiratory centers to increase the rate and depth of breathing. This mechanism prevents damage to the lungs that would be caused by over-inflation. 2  Signals from higher brain centers: Nerve cells in the hypothalamus and cortex also influence the activity of the respiratory centers. 3  During pain or strong emotions, the hypothalamus will tell the respiratory centers to speed up.
Inside delivery refers to the delivery of furniture to a specified office(s), or room(s) within the designated ship to address. 6 years ago data-config-site-section=chacha>
Stage 3. After your baby is delivered, you enter the final stage of labor. In this stage, you deliver the placenta, the organ that nourished your baby inside the womb. Each woman and each labor is different. The amount of time spent in each stage of delivery will vary. If this is your first pregnancy, labor and delivery usually lasts about 12 to 14 hours. The process is usually shorter for subsequent pregnancies.