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DOES SIZE MATTER? GCSE Biology By Dr H E Bloomfield © HEB.

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Presentation on theme: "DOES SIZE MATTER? GCSE Biology By Dr H E Bloomfield © HEB."— Presentation transcript:

1 DOES SIZE MATTER? GCSE Biology By Dr H E Bloomfield © HEB

2 People come in a range of shapes and sizes
© HEB

3 Are these Welsh athletes OK?
Gavin Henson Tanni Grey-Thompson © HEB

4 Are these people OK? Dawn French © HEB

5 Are these children OK? © HEB

6 Is this OK? © HEB

7 Health Problems Linked to Obesity
Greater risk of developing high blood pressure heart disease diabetes (high blood sugar) arthritis (worn joints due to the extra pressure put on them) © HEB

8 Leg X-ray leg from a 23 year old person who weighs 175 kg (about 28 stones).
Note the folds of skin and fat and the damage to the knee joint. The space between the thigh and shin bones should be even on both sides. The top of the shin bone is also rough. © HEB

9 Are these athletes OK? Paula Radcliffe © HEB

10 Are these supermodels OK?
© HEB

11 Are these children OK? © HEB

12 Is this OK? These people have Anorexia
© HEB

13 Any comments? © HEB

14 Health Problems Linked to Lack of Food
Reduced resistance to infection Irregular periods and lower fertility in women People can also develop health problems (deficiency diseases) if their diet is missing a particular food group © HEB

15 The effects of iodine deficiency The effects of protein deficiency
Is this OK? The effects of iodine deficiency The effects of protein deficiency © HEB

16 These children have rickets caused by a lack of Vitamin D
Is this OK? These children have rickets caused by a lack of Vitamin D © HEB

17 Are these OK? Chantelle Ant and Dec © HEB

18 END OF PART 1 © HEB

19 BODY MASS INDEX (BMI) © HEB

20 Body Mass Index (BMI) is a number calculated from a person’s height and weight. It is a measure of body fatness and applies to adults over 20, not to growing children. A person can use their BMI to find out if they’re a healthy weight for their height. © HEB

21 Calculating Body Mass Index (BMI)
BMI = Weight in kg (Height in m)2 Example If a person is 1.60 m tall and weighs 65 kg, BMI = = = © HEB

22 What BMI figures mean BMI What it means Less than 18.4
You are underweight for your height 18.5 to 24.9 You are an ideal weight for your height 25 to 29.9 You are overweight 30 to 39.9 You are obese Over 40 You are very (or morbidly) obese © HEB

23 Fred Flintstone Height = 180 cm = 1.80 m Weight = 105 kg BMI = 105 =
1.802 What it means - OBESE © HEB

24 Fred Flintstone Height = 180 cm = 1.80 m Weight = 105 kg
BMI = = = 32.4 What it means - OBESE © HEB

25 Marge Simpson Height = 1.50 m Weight = 55 kg BMI = 55 = 1.502
What it means - © HEB

26 Marge Simpson Height = 1.50 m Weight = 55 kg BMI = 55 = 55 = 24.4
What it means - IDEAL WEIGHT © HEB

27 Olive Oyle Height = 1.84 m Weight = 62 kg BMI = 62 = 1.842
What it means - © HEB

28 Olive Oyle Height = 1.84 m Weight = 63 kg BMI = 62 = 62 = 18.3
What it means - ALMOST UNDERWEIGHT © HEB

29 Nigel Thornberry Height = 192 cm Weight = 105 kg BMI = 105 1.922
What it means - © HEB

30 Nigel Thornberry Height = 192 cm Weight = 105 kg
BMI = = = 28.5 What it means - OVERWEIGHT © HEB

31 THE END © HEB

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