OBJ: Given notes, activity sheet SWBAT describe the stages of human development from the zygote to...
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Transcript of OBJ: Given notes, activity sheet SWBAT describe the stages of human development from the zygote to...
OBJ: Given notes, activity sheet SWBAT describe the stages of human development from the zygote to adulthood with 70% accuracy.
BRING IN TEXTBOOKDN: HW check- Male/Female Reproductive System Booklet
ACT: Introduction to Human Life Cycle (notes)Text, read p. 232-240; Complete Human Life Cycle Booklet
HW: Complete Human Life Cycle Booklet; INERH Exam, March 23 (this Monday).
Human Life Cycle NotesFertilization: joining of sperm and egg forming
zygote.
Zygote (one-cell stage): fertilized egg
Pre-birth Development:Zygote → Embryo → Fetus → (birth) → newborn baby
Embryo: from “two cell stage” to 8 weeks;
cell division occurs.
Fetus: 9 weeks to birth ~ 9 month
Ovulation, Fertilization, Zygote
fertilized egg, life begins
uterus, womb
fallopian tube
Watch video
Cell Division
newborn baby
fetus
Zygote
Birth
9 months
Amniotic Sac: fluid filled sac that cushions/protects embryo/fetus
Placenta: regulating organ between baby & mother; nutrients/oxygen in & waste out
Umbilical cord: connects embryo to placenta (belly button)
(see transparancy)Birth: ~ 9 month in humans; three stages:labor, delivery, afterbirth
Labor: strong muscular contractions of uterus, cervix (opening) enlargesDelivery: from uterus to outside worldAfterbirth: contractions push placenta and other membranes/fluid out through the vagina.
Amniotic Sac
Labor Delivery Afterbirth
Placenta
baby’s head with hair
I needmy coffeeNOW!!
Umbilical cord
Human Life Cycle NotesMultiple Birth: see transparancy
Identical twins: from a single fertilized egg that splits results in two genetically identical individuals (copies; natural clone).
Fraternal twins: two different eggs released & fertilized by two different sperm; two different individuals sharing the same womb
Infancy (1-2 yrs): dramatic change in shape & size; nervous / muscular system development; learning new physical skills.
Childhood (2-12 yrs): more active, independent, further physical & mental changes
Adolescence (13-19): gradual change from child to adult
Puberty (9-15yrs): At 12-14 yrs, ability to reproduce; produce baby
Young Adult: 20 to 50yrsSenior Adult: 60+ yrs; wisdom, knowledge about life
Aging: (30+ yrs) skin begins to wrinkle, decrease muscle strength, changing hair color, eye problems (40-65 yrs) menopause (ovulation, menstruation stops), decrease sperm
Slow Aging: diet, exercise
Human Life Cycle Notes
Infancy Childhood Adolescence Young Adult Senior Adult
Human Life Cycle Notes