Although there is a transition period between scarless and scar-forming repair, sca … hypertrophy. For this reason one no longer divides the fetal period into Carnegie stages. The head of the fetus grows relatively slower than the rest of the body. During which period do the three cell layers of endoderm, ectoderm, and mesoderm form? Fetal weight gain is phenomenal (_____) during the terminal weeks. It can be injured during the perinatal period and by postnatal damage. extrauterine. Prenatal development, the process encompassing the period from the formation of an embryo, through the development of a fetus, to birth. The Cell Cycle and Cellular Reproduction. The fetal period. From The Biology of Prenatal Development. Third trimester: Development of behaviour states which are regulated by the fetal brain. The Embryonic Period. Topics. The fetal inflammatory response syndrome (FIRS) is a condition characterized by systemic inflammation and an elevation of fetal plasma interleukin-6. The early dominance of the head is reduced as development of the trunk becomes a major factor in the growth of the early fetus. The increase of this probability is gradual and identical for breech and cephalic presentations during this period. During brain development, the fetal period is vital in creating neurons from neural stem cells to build up a functional adult brain. All of the tissues and organs that develop during the embryonic period grow and differentiate during the fetal period (week 9 of development until birth). Fetal length increases _____. This process can be divided into three distinct stages: the pre-embryonic stage, the embryonic period, and the fetal period. Terminology. Problem 14WDL from Chapter 3: The fetal period is characterized by which key events? Fetus: Refers to the unborn baby after 10 weeks of gestation until birth. The bone marrow begins to take over the process of erythrocyte production—a task that the liver performed during the embryonic period. Fetal Stage . Acknowledgments. The near term period is characterized by pronounced periods of fetal breathing efforts that mirror in fetal heart rate regulation. hyperplasia, and increased cellular size, i.e. The brachial plexus is an important nervous system structure. Memory aid. The body catches up. Scarless healing in the fetus is characterized by regeneration of an organized dermis with normal appendages and by a relative lack of inflammation. linearly. The inner and outer morphologic alterations are less noticeable. Anatomy & Physiology: An Integrative Approach (3rd Edition) Edit edition. Expert solutions for 21) The fetal period is characterized by _____. The fetal period of prenatal develop marks more important changes in the brain. Answer to The fetal period is characterized by what changes?. Get solutions Both quiet (NREM) and active (REM) sleep are distinguishable during the last 10 weeks of gestation. The Fetal Stage of Pregnancy. The fetal period that begins after the 8th week is characterized by the growth and maturation of the organs. When it arises, the condition begins after 20 weeks of pregnancy. Fetal movements are frequent during this period, but are jerky and not well-controlled. a. fetal b. zygotic c. germinal d. embryonic e none of the above 3. b. This stage is marked by amazing change and growth. In the human: Stages during pregnancy. Breathing-like movements of the fetus are necessary for the stimulation of lung development, rather than for obtaining oxygen. Buy Now: Script: During the first 8 weeks following fertilization, the developing human is called an embryo, which means "growing within." Problem 15WDL from Chapter 29: Comparable to fetuses, low risk preterm infants recorded at 30-40 weeks postconceptional age, had a similar development of sleep i.e. Human Anatomy (3rd Edition) Edit edition. Fetal Period The final stage of fetal development The fetal period of prenatal development begins on the last day of the eighth week after fertilization and continues until birth.

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