Answer:
The curves help the spine absorb stress from body movement and gravity. When viewed from the back, the spine should run straight down the middle of the back.
Explanation:
Answer:
they can form complex organ systems.
Answer:
Not necessarily
Explanation:
The human body needs carbs for energy. A salad is still going to have some carbs, just like processed foods such as Oreos or something. Some things you buy will be empty calories, if they are made of sugar and are not high in nutritional value. The amount of nutritional value in someone's food is not dependent on carbs, or calories, you have to look at the whole thing.
