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embryo    音标拼音: ['ɛmbri,o]
n. 胎儿,胚胎,胚芽

胎儿,胚胎,胚芽

embryo
n 1: (botany) a minute rudimentary plant contained within a seed
or an archegonium
2: an animal organism in the early stages of growth and
differentiation that in higher forms merge into fetal stages
but in lower forms terminate in commencement of larval life
[synonym: {embryo}, {conceptus}, {fertilized egg}]


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  • Embryo - Wikipedia
    A newly developing human is typically referred to as an embryo until the ninth week after conception, when it is then referred to as a fetus In other multicellular organisms, the word embryo can be used more broadly to any early developmental or life cycle stage prior to birth or hatching
  • EMBRYO Definition Meaning - Merriam-Webster
    : an animal in the early stages of development that are marked by cleavage, the laying down of the basic tissues, and the formation of primitive organs and organ systems compare fetus : a tiny young plant within a seed : a beginning or undeveloped stageused especially in the phrase in embryo
  • Embryology | Description History | Britannica
    Embryology, the study of the formation and development of an embryo and fetus Before widespread use of the microscope and the advent of cellular biology in the 19th century, embryology was based on descriptive and comparative studies
  • What Is the Biological Definition of an Embryo?
    The biological definition of an embryo describes the early stages of human development, from fertilization through the initial formation of major body structures
  • Embryo vs. Fetus: How to Tell Them Apart - Verywell Health
    An embryo is the early stage of development and lasts from week five to week 10 of pregnancy A fetus is the later stage of development and lasts from the end of week 10 until birth
  • Embryo - Definition and Examples - Biology Online Dictionary
    An embryo is a newly fertilized egg (zygote) up till the eighth week of development as it transforms through the morula, blastula, gastrula, and organogenesis stages
  • Embryo | definition of Embryo by Medical dictionary
    embryo An organism in its earliest stages of development, especially before it has reached a stage at which it can be distinguished from other species The human embryo is so called up to the eighth week after fertilization After that it is called a fetus
  • What is an Embryo? (with pictures) - AllTheScience
    What is an Embryo? An embryo is an organism in the early stages of development which cannot survive on its own The precise definition of it varies; in humans, for example, a fertilized egg may be considered an embryo until around the eighth week of pregnancy, at which point it is termed a fetus
  • Embryo | Anatomy and Physiology | Research Starters - EBSCO
    An embryo is the early developmental stage of a multicellular organism, particularly in humans, where it develops from conception until the eighth week of pregnancy
  • Embryo - healthencyclopedia. org
    An embryo is defined as the developing organism from the time of fertilization until the end of the eighth week of gestation, when it becomes known as a fetus In human pregnancy, the embryonic period begins when a sperm fertilizes an egg, creating a zygote





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