Science curiosity-life-before-birth

Published on January 20th, 2012

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Curiosity: Life Before Birth

Life Before Birth hosted by Courteney Cox

A new life begins
The combination of 46 chromosomes with 30,000 genes at conception determines all physical characteristics: gender, facial features, body type, hair color, eyes and skin.
Even more surprising is that intelligence and personality, the way you think and feel, were already in our genetic code. When you are in essence and unique design yourself.

We have evolved from a single cell to a tiny human being with all organs functional. In the remaining time spent in the womb we have improved, we have grown and we practiced. Still in the womb I started to move, to swallow and to “breathe” amniotic fluid to react to stimuli and generally prepare for life outside.

A heart that beats (28 days)
When the heart begins to beat for the first time in 18 days baby through the umbilical cord blood, crosses the placenta and maternal blood vessels close to the belly. The two resources each cargo blood gas changes along Partitions: mother gives her child dioxod carbon residues and she gives the child oxygen and nutrients.

Neural activity (44 days)
The child became sensitive and responds to touch. All five main areas of the adult brain are present. Measured by EEG brain activity was detected even at 40 days.
From this great center of control messages sent by the mother and child. Head occupies one third of the total body but will become more proportionate to the body as the child grows.

Environment (8 weeks)
The child lives in a transparent membrane called the amniotic sac. The bag is filled with a salt solution that bathes body cells. Through a complex process, the body recycles some swallowing liquid, absorbing and eliminating another and produce much of it. Embryo almost weightless floating in fluid so it is protected from shocks and should not fight gravity.

Hands and feet
Hands begin to form in about 3 weeks and 6 weeks fingers. Child can close your fingers and open your mouth to the pressure applied to the răspunsde thumb. At first when hands touch the mouth, the baby turns his head while his mouth opens. Later, he will turn his head to his hands and put his finger to his mouth to suck it. Nails appear at 7 months. Child’s legs and feet grow a bit later than arms and hands. At about 9 weeks, in response to a touch on foot, he will move his toes or bend the knees and hips to move away from the object. From 2 months fingerprints legs are already embedded in the skin. He begins to slow movements, sudden bumps or bruises weak and rhythmic.

Sound and sight
The child is surrounded by loud sounds such as the mother’s heartbeat and powerful music. He responds to sounds with frequencies as high or low that is indistinguishable by ear adult, this suggests that other sensory pathways involved outside the ear. The child responds to different sounds, including mother’s voice and is in tandem with the rhythm of life of the mother (often wakes up and sleeps with it). Orbital muscles appear before the baby moving his eyes when they change position and when asleep. Light enters through the uterine wall and the amniotic fluid and fetal activity increases in response to bright light. Eyelids remain closed until the seventh week to protect the eyes. Repeated flashes of light will calm your unborn baby.

Movement
Child begins to make sudden movements about 7 weeks, but my mother does not usually feel baby move until 16 weeks. At 11 weeks, the baby swallows amniotic fluid and sends it back through the urine. He can have complex facial expressions and even smile. 18 weeks is active and energetic and do more exercise. They can hold very tight fist and can punch and kick.

Two tiny chains of genetic information: One with a motor; the other a yolk. Somehow they will combine to become the most complex, delicate, sophisticated machine known to man. But exactly how does this process work? Moreover, how does a single-celled organism develop the extraordinary spark that is consciousness? Combining case studies of real life pregnancies with the latest 4-D ultrasound and ultra-high res CGI, this is the story of human fetal development.

Also watch The Business of Being Born and In the Womb

Watch Discovery Channel – Curiosity: Life Before BirthTurn off the lights

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