Chapter 5: GrowthChapter 5: Growth

5.1 Pattern of Human 5.1 Pattern of Human GrowthGrowth

How Growth Is Measured?How Growth Is Measured?

Growth is an increase in Growth is an increase in body size, number body size, number of cells, appearance& weight.of cells, appearance& weight.

It’s also a change in the It’s also a change in the body shape & body shape & body function of an organism.body function of an organism.

Growth is Growth is irreversible & permanent.irreversible & permanent. Human growth rate is usually measured in Human growth rate is usually measured in

terms of terms of height & weight.height & weight.

Infancy Infancy

- Growth rate is rapid in infancy- Growth rate is rapid in infancy ChildhoodChildhood

- Children experience a slower growth rate- Children experience a slower growth rate AdolescenceAdolescence

- The growth rate of an adolescent is faster - The growth rate of an adolescent is faster than that of a childthan that of a child

AdulthoodAdulthood

- The growth rate of an adult is almost zero- The growth rate of an adult is almost zero Old age/agingOld age/aging

- Negative growth rate- Negative growth rate

Growth From The Aspects Of Height & Growth From The Aspects Of Height & Body WeightBody Weight

The differences in the growth rate of boys & girls as The differences in the growth rate of boys & girls as follows:follows:

(I) In infancy (0-2 years)(I) In infancy (0-2 years) - Boy’s growth rate = girl’s growth rate- Boy’s growth rate = girl’s growth rate(II) In childhood (2 – 12 years)(II) In childhood (2 – 12 years) - Boy’s growth rate faster than girl’s growth rate- Boy’s growth rate faster than girl’s growth rate(III) In adolescence (12 -14 years)(III) In adolescence (12 -14 years) - Girl’s growth rate faster than boy’s growth rate- Girl’s growth rate faster than boy’s growth rate(IV) In adulthood (14 – 19 years)(IV) In adulthood (14 – 19 years) - Physical growth in girls stop at 17 yrs age, in boys - Physical growth in girls stop at 17 yrs age, in boys

at 18 years of age.at 18 years of age.

Effects of Nutrition On The Growth Of ChildrenEffects of Nutrition On The Growth Of Children Proper nutrition is necessary for Proper nutrition is necessary for healthy mental & physicalhealthy mental & physical growth in growth in

childrenchildren.. Lack of nutrients in a child’s diet results in Lack of nutrients in a child’s diet results in stunted growth.stunted growth.

NutrientNutrient ImportanceImportanceProteinProtein Builds new tissues in the bodyBuilds new tissues in the body

Carbohydrates & fatCarbohydrates & fat Supply energy because children are Supply energy because children are very activevery active

Calcium, phosphorus & Calcium, phosphorus & Vitamin DVitamin D

Form strong bones & teethForm strong bones & teeth

IronIron Forms haemoglobin in red blood Forms haemoglobin in red blood cellscells

VitaminsVitamins Build body’s defence against Build body’s defence against infections diseasesinfections diseases