Food: Where dose it come from Flashcards
Two Sources of Food
Plants & Animal
Photosynthesis
Plants take carbon-di-oxide from air and soil from water to prepare its food using chlorophyll (the green pigment in) leaves
Pulses
Seeds of plants - beans, kidney beans, etc are called pulses.
Sprouting
Process of sprouting seeds for sometime, after which they are drained and kept undisturbed till shoots emerge from them.
Why do people sprout the seeds
Sprouted seeds are very nutritious
Parts of plants as foods
Roots, Leaves, Stems, Flower, Seeds, Fruits, Vegetables
Some other parts of foods
Tea leaves and coffee beans
Oil
Dry fruits
Spices
Animal Foods
Meat
Milk
Honey
Why we need food
Food provides with energy for growth, movement and repair
Based on eating habits, animals are divided into
OCH
Omnivores
Carnivores
Herbivores
Omnivores
Animals that eats plants as well as the flesh of other animals. Eg cats, monkeys, rats, human beings
Special features of Omnivores
- Dentition - teeth to eat both plants and animals
Human Dental System as omnivores
Blade like incisors to bite
sharp canines to tear
Flatter and broader molars and premolars to chew
Scavengers
Organisms that feed mainly on dead and decaying animal and plant matter - eg. Vultures Hyenas etc
Decomposers
Organisms that obtain nutrients by breaking down the remains of dead organic matters Eg. Fungi, microorganisms such as bacteria
Herbivores
Animals that eat only plants or plant parts - eg rabbits, elephants
Dentition in herbivores
premolars and molars which break down the plant materials to fine particles - flat and broad surfaces with many folds to grind the plant materials.
Sharp incisors to bite off plants
Carnivores
Animals that eat only flesh of other animals - eg lizards, eagles, lions
Dentition in carnivores
sharp and pointed canines to tear off large pieces
Carnassial Teeth
Sharp and unevenly edges molar and premolar in carnivores
