DEVELOPMENT-AND-AGEING

Development, Heredity, and Aging Summary with Mnemonics

  1. Prenatal Development:

    • Stages:

      • Germinal (0-2 weeks) (G)

      • Embryonic (2-8 weeks) (E)

      • Fetal (8 weeks-birth) (F)

    • Mnemonic: G.E.F. - Grand Early Foundations

  2. Fertilization Process:

    • Union of sperm + oocyte = zygote (46 chromosomes)

    • Mnemonic: S.O.Z. - Sperm Unites Oocyte to form a Zygote

  3. Placenta Development:

    • Formed from embryonic + maternal tissues

    • Supplies nutrients, oxygen (via umbilical cord)

    • Mnemonic: P.O.T. - Placenta Obtains Toxins

  4. Germ Layer Formation:

    • Ectoderm (skin/nervous), Mesoderm (muscles/bones), Endoderm (organs)

    • Mnemonic: E.M.E. - Each Must Emerge

  5. Development of Structures:

    • Limb buds (day 28), organogenesis (weeks 2-8)

    • Mnemonic: D.O.L.L. - Development Of Limb and Life

  6. Parturition:

    • Stages are dilation, expulsion of the baby, expulsion of placenta

    • Mnemonic: D.E.P. - Dilation, Exit, Placenta

  7. Changes at Birth:

    • Newborn physiological adjustments (circulatory, respiratory)

    • Mnemonic: C.R. - Circulatory and Respiratory

  8. Lactation:

    • Produced by prolactin, released via oxytocin

    • Mnemonic: P.O. - Prolactin Outputs

  9. Genetics Overview:

    • Involves chromosomes, genes, hereditary traits, genetic disorders

    • Mnemonic: G.C.G.D. - Genes Carry Genetic Data

  10. Stages of Development:

  • Germinal (0-14 days), Embryonic (14-56 days), Fetal (56 days-birth)

  • Mnemonic: G.E.F. Stages - Growth Every Few weeks

These mnemonics will help you to memorize the key concepts related to development, heredity, and aging effectively!