Answer:
B. Carbon dioxide is carried through the blood vessels back to the lungs.
Explanation:
Answer: 1.) D. 2.) D. 3.) A.
Explanation: 1.) When you feel hungry, Your body reacts because it is you needing the nutrients and protein and just the hunger to go away. Your body has systems that also control different things including your appetite.
2.) What you put in your body balances out when you exercise and burn the carbs and lose the calories.
3.) There is a borderline when it comes to obese. Obesity is the effect of eating way more than usual and not exercising and not getting blood pumping throughout your body regularly each day.
Answer:
B. From 30 seconds to 2 minutes
Explanation:
They can live on hard surfaces for up to 24 hours, but not things like tissues only live up to 15 minutes
