19. Stages of Development Flashcards
List the stages of development
Prenatal, Infancy, Childhood, adolesence, Early adulthood, Middle Age, Old Age
List the types of development
Physical, Intellectual or Cognitive, emotional and social
List the substages of the prenatal stages of development and their weeks
Germinal 0 - 2 weeks, embryonic 3-8 weeks, foetal 9 weeks to approx 40
Conception
When the sperm meets the egg.
Prenatal Stage
Start/EndBegins when a sperm fertilises an egg to form a complete cell called a zygoteEnds at birthKey Characteristics Prenatal stage continues until birthIt is characterised by the development of the body’s organs and structuresThe unborn baby goes from being a single celled zygote to consisting of more than 200 billion cells at birth and weighing 3.5kgThis stage of the lifespan has the fastest growth and is the most vulnerable stage of the lifespan
Germinal
0-2 weeks
Embryonic
3-8 weeks
Foetal
9 weeks till birth
Examples of development during the germinal stage
Conception occurs and cells mutliply to form a zygote. This zygote implants into the uterine wall
Examples of development in the embryonic stage
All organs (not reproductive) and all major body structures and systems develop. Basic features emerge e.g. eyes, nose, mouth, arms and legs. By week 8 the heartbeat is detectable
Examples of development in the foetal stage
The main goal of the foetus is to increase in size. Testes and ovaries (sex organs) are formed. Organs start to function e.g. digestive system. Bones begin to ossify (harden). Brain develops and can perform basic functions to sustain life
Infancy Stage of Development
0-2 years old.
Childhood
2-10 years old
Adolescence
10-20 years of age
Early Adulthood
20-40 years of age
Middle Age
40-65 years of age
Old Age
65 onwards
Zygote
sperm and the egg meet and form a zygote
Implantation
When the zygote embeds into the lining of the uterus wall
Pregnancy
Period of time between fertilisation and birth
Placenta
provides nourishment and waste removal within uterus for foetus
Umbilical cord
joins the foetus to the placenta
Amniotic sac
contains fluid which provides protection (cushioning)
GYN
gynaecology
