7 Growth_2009

7 Growth_2009 - Growth and Development Prenatal Postnatal -...

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Growth and Development Prenatal Postnatal - bone, muscle and fat - growth curves - endocrine aspects of growth
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Definitions Growth - increase in mass of structural tissue (bone, muscle, connective tissue) until a mature size is reached. - increase in cell size (hypertrophy) - increase in cell number (hyperplasia, mitosis)
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Definitions Development (Differentiation) - formation of specialized tissues or organs from a common origin “specialization”
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Prenatal As soon as fertilization takes place, growth and development begin Most animals begin diffentiation at the blastocyst stage of development
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1 cell 2 cell 4 cell 8 cell Up to 8 cell stage, cells are totipotent - any cell if removed can develop into a com- plete animal
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inner cell mass tropho- blast blastoceole cells begin to differentiate and are unipotent (only develop into one type of tissue) Blastocyst
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In the blastocyst, inner cell mass become fetus proper cells within inner cell mass differentiate into bones, muscle, nerves, etc.
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This note was uploaded on 02/20/2010 for the course ANS 150 taught by Professor Jamoore during the Fall '08 term at N.C. State.

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7 Growth_2009 - Growth and Development Prenatal Postnatal -...

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