home > dvd ilustrado multilíngue

DVD Ilustrado Multilíngue

The Biology of Prenatal Development

6 Meses - Nascimento

THE BIOLOGY OF PRENATAL DEVELOPMENT

.English

Escolha o Idioma:

Baixar Versão em PDF O Que é PDF?

Mostrar Índice


Capítulo 43 5 a 6 Meses (20 a 24 Semanas): Responde ao Som; Cabelo e Pele; Idade de Viabilidade

Reproduzir Filme \| Veja Instantâneos	By 24 weeks the eyelids reopen and the fetus exhibits a blink-startle response. This reaction to sudden, loud noises typically develops earlier in the female fetus.
Reproduzir Filme \| Veja Instantâneos	Several investigators report exposure to loud noise may adversely affect fetal health. Immediate consequences include prolonged increased heart rate, excessive fetal swallowing, and abrupt behavioral changes. Possible long-term consequences include hearing loss.
Reproduzir Filme \| Veja Instantâneos	The fetal respiratory rate can rise as high as 44 inhalation-exhalation cycles per minute.
Reproduzir Filme \| Veja Instantâneos	During the third trimester of pregnancy, rapid brain growth consumes more than 50% of the energy used by the fetus. Brain weight increases between 400 and 500%.
Reproduzir Filme \| Veja Instantâneos	By 26 weeks the eyes produce tears. The pupils respond to light as early as 27 weeks. This response regulates the amount of light reaching the retina throughout life.
Reproduzir Filme \| Veja Instantâneos	All components required for a functioning sense of smell are operational. Studies of premature babies reveal the ability to detect odors as early as 26 weeks after fertilization. Placing a sweet substance in the amniotic fluid increases the rate of fetal swallowing. In contrast, decreased fetal swallowing follows the introduction of a bitter substance. Altered facial expressions often follow.
Reproduzir Filme \| Veja Instantâneos	Through a series of step-like leg motions similar to walking, the fetus performs somersaults.
Reproduzir Filme \| Veja Instantâneos	The fetus appears less wrinkled as additional fat deposits form beneath the skin. Fat plays a vital role in maintaining body temperature and storing energy after birth.
Capítulo 44 7 a 8 Meses (28 a 32 Semanas): Discriminação de Sons, Estados Comportamentais

Reproduzir Filme \| Veja Instantâneos	By 28 weeks the fetus can distinguish between high- and low-pitched sounds.
Reproduzir Filme \| Veja Instantâneos	By 30 weeks, breathing movements are more common and occur 30 to 40% of the time in an average fetus.
Reproduzir Filme \| Veja Instantâneos	During the last 4 months of pregnancy, the fetus displays periods of coordinated activity punctuated by periods of rest. These behavioral states reflect the ever-increasing complexity of the central nervous system.
Capítulo 45 Os Membros e a Pele

Reproduzir Filme \| Veja Instantâneos	By approximately 32 weeks, true alveoli, or air "pocket" cells, begin developing in the lungs. They will continue to form until 8 years after birth.
Reproduzir Filme \| Veja Instantâneos	At 35 weeks the fetus has a firm hand grasp.
Reproduzir Filme \| Veja Instantâneos	Fetal exposure to various substances appears to affect flavor preferences after birth. For instance, fetuses whose mothers consumed anise, a substance which gives licorice its taste, showed a preference for anise after birth. Newborns without fetal exposure disliked anise.
Capítulo 46 9 Meses até o Nascimento (36 Semanas até o Nascimento)

Reproduzir Filme \| Veja Instantâneos	The fetus initiates labor by releasing large amounts of a hormone called estrogen and thus begins the transition from fetus to newborn. Labor is marked by powerful contractions of the uterus, resulting in childbirth.
Reproduzir Filme	From fertilization to birth and beyond, human development is dynamic, continuous, and complex. New discoveries about this fascinating process increasingly show the vital impact of fetal development on lifelong health. As our understanding of early human development advances, so too will our ability to enhance health - both before and after birth.