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Questions and Answers
What is responsible for the early nourishment of the embryo before the placenta is well established?
What is responsible for the early nourishment of the embryo before the placenta is well established?
Which structure gives rise to the smooth muscles of the viscera and myocardium?
Which structure gives rise to the smooth muscles of the viscera and myocardium?
What becomes the neurons of the peripheral nervous system during ontogeny?
What becomes the neurons of the peripheral nervous system during ontogeny?
Which part of the blastocyst gives rise to fetal membranes in a conceptus?
Which part of the blastocyst gives rise to fetal membranes in a conceptus?
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What is responsible for absorbing nutritive material from maternal blood during early nutrition?
What is responsible for absorbing nutritive material from maternal blood during early nutrition?
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Which structure gives rise to the epithelial lining of the respiratory, digestive, and genitourinary tract?
Which structure gives rise to the epithelial lining of the respiratory, digestive, and genitourinary tract?
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What is the typical and most widespread form of ontogenic development occurring in sexual reproduction?
What is the typical and most widespread form of ontogenic development occurring in sexual reproduction?
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When does the fetal period occur in the ontogenic development process?
When does the fetal period occur in the ontogenic development process?
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Which phase of ontogenic development involves the development and maturation of sex cells known as gametes?
Which phase of ontogenic development involves the development and maturation of sex cells known as gametes?
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What does ontogeny refer to in an individual's lifespan?
What does ontogeny refer to in an individual's lifespan?
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Which term is used for the development of new individuals through asexual reproduction?
Which term is used for the development of new individuals through asexual reproduction?
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When does the embryonic period end in ontogenic development?
When does the embryonic period end in ontogenic development?
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What is the process that involves the increase in cellular size and number of cells in an organism?
What is the process that involves the increase in cellular size and number of cells in an organism?
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Which term describes the change in shape or location of a cell or tissue?
Which term describes the change in shape or location of a cell or tissue?
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What is the process by which a cell or cell line attains a stable phenotype?
What is the process by which a cell or cell line attains a stable phenotype?
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Which group controls the differentiation of another group of cells in tissue interaction?
Which group controls the differentiation of another group of cells in tissue interaction?
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What do neuroblasts become during development in the nervous system?
What do neuroblasts become during development in the nervous system?
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What do spongioblasts develop into in the central nervous system?
What do spongioblasts develop into in the central nervous system?
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Study Notes
Early Embryonic Development
- The yolk sac is responsible for the early nourishment of the embryo before the placenta is well established.
Development of Muscles and Nervous System
- The lateral plate mesoderm gives rise to the smooth muscles of the viscera and myocardium.
- The neural crest becomes the neurons of the peripheral nervous system during ontogeny.
Development of Fetal Membranes
- The extraembryonic ectoderm gives rise to fetal membranes in a conceptus.
Nutrition and Development
- The yolk sac is responsible for absorbing nutritive material from maternal blood during early nutrition.
- The endoderm gives rise to the epithelial lining of the respiratory, digestive, and genitourinary tract.
Ontogenic Development
- The typical and most widespread form of ontogenic development occurring in sexual reproduction is embryogenesis.
- The fetal period occurs from the ninth week of gestation to birth in the ontogenic development process.
- The gametogenic phase involves the development and maturation of sex cells known as gametes.
- Ontogeny refers to the entire development of an individual from a fertilized egg to maturity.
Alternative Forms of Development
- The term used for the development of new individuals through asexual reproduction is embryony.
Developmental Phases
- The embryonic period ends at the eighth week of gestation in ontogenic development.
Cellular Development
- The process that involves the increase in cellular size and number of cells in an organism is growth.
- The term that describes the change in shape or location of a cell or tissue is morphogenesis.
- The process by which a cell or cell line attains a stable phenotype is differentiation.
- In tissue interaction, the ectoderm group controls the differentiation of another group of cells.
Development of the Nervous System
- Neuroblasts become neurons during development in the nervous system.
- Spongioblasts develop into oligodendrocytes in the central nervous system.
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Description
Learn about the formation of body structures and organs (organogenesis) in embryology, which involves cell division (proliferation) and cell differentiation (specialization). Explore the process of blastogenesis used for the development of new individuals through asexual reproduction. Gain insights into ontogeny, which encompasses an individual's entire lifespan from zygote to postpartum life.
