Animal Systems. Feeding and Digestion Respiration Circulation Excretion. Feeding and digestion. How does digestion occur? How are mouthparts adapted for different diets?. Ways of obtaining food.
Feeding and Digestion
How does digestion occur?
How are mouthparts adapted for different diets?
Why do we need to eat?
What nutrients does your body need?
What is a balanced diet?
Food contains energy our body needs to carry out its functions
Laboratories measure the calories (energy) found in food by heating it up
A calorie (lower case c) is the amount of energy needed to raise the temperature of water by 1 degree Celsius
A dietary Calorie is equal to 1000 “calories”
There are about 45 substances found in food that your body does not make itself, therefore we need to consume it somehow.
Water, the body needs water to carry out cell processes, it makes up most of your blood, and extracellular fluid.
Water is lost even when we breath
On hot days we need to drink more fluids than normally to replace those lost through sweat.
Found in many things you wouldn’t think
Carbs are in the sugars found in fruits, grains, potatoes, milk
Usually people associate fat in their diet as a bad thing, but we actually need it
If you don’t get enough you may not be able to absorb some essential vitamins found in foods
Organs wouldn’t be insulated
Supply minerals for growth and repair