Growth Flashcards
What does growth involve
Series of changes not just the addition of material to achieve an increase in size
Changes involve differentiation of various parts of the body to perform diff fxns
What is growth
Development of living being or part of an organism from it’s earliest stage to maturity, including the attendant increases in size
Describe human body growth
N/a
Neonatal period
Extends from birth to end of four weeks
Infancy
End of neonatal period at 4 weeks until 2 years of age
Characterized by tremendous growth, increased coordination & mental development
Childhood
Period of growth and development extending frm infancy to adolescence, @ which puberty begins. Chronological duration of childhood varies cuhs puberty begins @ diff ages for diff people. Childhood years period of relatively steady growth until preadolescence when there is growth spurt
Adolescence
Between childhood n adulthood. Begins arnd 9 in girls n 11 in boys. The end of adolescence is approx 17-18 yrs, but not clearly delineated
Adulthood
Period of life beyond adolescence. Adult reached max physical stature as determined by genetic, nutritional, and environmental factors
Distance curves
Measurements taken at intervals are plotted against time to produce a graph of progress
Velocity curve
Increments in growth are plotted against time to show variation in the RATE of growth w/time
Longitudinal growth
Growth curve derived frm single individual or frm repeated measurements on same group of individuals over a period of many years
Cross sectional data
Measurements made of several children in each age group, n these are then combined to form cross sectional picture of various age groups in the community @ the time of investigation
Difference in growth RATE between girls vs boys
Girls grow up faster than boys (reach 50% of adult height at earlier age, 1.75 vs. 2 yrs) enter puberty earlier n cease growing earlier. 1/2 way thru foetal period the skeleton already 3 weeks more advanced in girls. @ birth, difference is 4-6 weeks of maturation, at puberty difference is 2 years
Indices of maturity
Skeletal age Dental age Growth curve Sexual age Neural age
Early n late maturing children
Average children
Early maturing children - tall in childhood but not as adults
Early maturing children n genetically tall
Late maturing children - sm childhood but not as adults
Late maturera n genetically short