Why does your heart never tire of constantly beating to pump blood throughout your body?

Name three methods a person can take to protect their skin from the sun. site 1

At age 16, juana has an appropriate weight and eats whatever she wants whats the best stratwgy juana can use to ensure good health? a) walk once a day and start paying attention to her diet to prevent weight gain b)engage in regular. physical activity and get in the habit of eating food that is high in nutrients c) take up an aerobic sport like soccor and reduce her calorie intake to 1800 per day

Oxygen passes through capillary walls and into interstitial space where cells absorb ? a. nitrogen, b. oxygen, c. carbon dioxide, d. metabolic waste