Use renewable energy sources, like hydro or solar power. Or use more recyclable items.
Answer:
The trachea serves as a passage for air, moistens and warms it while it passes into the lungs, and protects the respiratory surface from an accumulation of foreign particles.
They need water,light, and carbon dioxide
A. The car ahead of you is turning
Atria is a large part of the heart so too big for cells; arteries & veins lead away or to the heart.
Capillaries are the smallest vascular structures that allow materials to be exchanged easily between cells.
