Baby’s respiration organs begin their work right after the moment of arrival together with his first cry. Breath frequency and intensity changes under the influence of different exogenous and endogenous irritators. Baby’s organism needs much of oxygen, and high frequency of respiration covers this necessity. Lungs of a newborn baby are rich in blood vessels and poor in the elastic tissue.
The newborn baby’s nose is little, his nostrils are extremely narrow, the mucous membrane is tender with a big number of blood vessels that is why even the least inflammation may cause difficulties with breathing.
Because of the horizontal ribs position and week intercostal muscles a baby breathes often and not deeply. Because of this respiration peculiarity his lungs do not get filled with oxygen completely, which leads to oxygen dearth. If your baby spends much time in a badly aired room, it may grow progressively worse and it may even cause flatulence. While a baby is crying, his bungs get ventilated better, so a weak baby’s cry may even be useful sometimes.
Before the moment of birth baby’s respiration is placental. After the first breath his lungs open and get filled with blood.
Heart mass of a newborn baby is relatively big. It weights 0,8 % of his body mass. The heart is of a roundish form and it is situated in the middle of the chest. The correlation of atriums and ventricles of a newborn baby is different than adult people have: babies’ atriums are of a bigger size.
Newborn baby’s pulse is relatively often: up to 120-140 beats per minute. It is quite uneven. The frequency of baby’s heartbeats depends on his cry, movements, raised temperature, and other reasons. While your little one is crying, his pulse may be up to 180-200 beats per minute. But the pulse frequency decreases, as a baby gets older. So, at the age of 6 months, baby’s pulse is about 125-130 beats per minute, and it is 115-120 beats per one minute, when your child is 12 months old.