Regular physical activity can improve your muscle strength and boost your endurance. Exercise delivers oxygen and nutrients to your tissues and helps your cardiovascular system work more efficiently. And when your heart and lung health improve, you have more energy to tackle daily chores.
The answer that you are looking for is A. Nephrons
Answer:
they inject people with small amounts of deadly viruses to get us immune to it so its harder for the body to get sick. like the flu shot it basically kind of has the flu in it and when you get injected with it the body gets immune to it so its harder for you to get sick with the flu because your bodies already immune to that virus hopefully this helped
Explanation:
4. Hallucinogens.
5. Weed.
6. Yes, but no.
7. True
Answer: sry i learned this when i was in fifth grade its the vascular system
