Page 405 - General Knowledge

GENERAL KNOWLEDGE 2019

 Does not contain blood vessels.
 Outermost layer of the skin.
Dermis
 Innermost layer of the skin.

 Gives elasticity to allow stretching and conferring flexibility.
 On average, nails grow 1mm per week.
 Connective tissue layer.
 Contains collagen and elastic fibers.
 Protein, keratin epidermal tissue to form finger nails.
Hypodermis
 Made up of adipose tissue.
 Protect against infectious organisms.
 Protects body from dehydration.
 Maintains body temperature by homeostatis.
 Generates vitamin D on exposure to UV light.
 Water, fat, glucose and Vitamin D are stored.
Animal nutrition and Digestion
 Animals are not capable of synthesizing their own food.
 They obtain food from outside environment for their nutritional requirements.
Mineral Nutrients
 Metals, non-metals and their salts except carbon, nitrogen, hydrogen and oxygen.

 Constitutes about 4% of total body weight.
 Sources of minerals- milk, eggs, meat, food, fruits and vegetables.
 Consists of two types:
Macronutrients: Required in large amount. E.g. Ca, P, K etc
Micronutrients: Requires only small amount. E.g I, Fe, Zn atc.
Water
 Human body consists of 75% water.
 Essential for digestion, transportation, excretion.
 To regulate body temperature.
Food Adulteration
 Addition of undesirable, cheap and harmful substances in the food.
 Indian Standards Institution (ISI) Mark and Agmark are given by Bureau of Indian Standards
(BIS).
Human Digestive System
 Consists of alimentary canal and digestive glands.
 Alimentary canal consists of mouth (teeth and tongue), oesophagus, stomach, small
intestine and large intestine.
Teeth
 With the help of teeth, food is chewed.
 Consists of four types.
Incisors – for cutting
Canines – for tearing.
Premolars – for chewing

401 | P a g e shop.ssbcrack.com