Breathing is the process of taking in oxygen and removing carbon dioxide from your body.

Here's how it works:

1. Inhale (Breathe in):

   • Your diaphragm (a muscle below your lungs) contracts and moves downward.

   • Your chest expands, and your lungs fill with air.

   • Oxygen from the air passes into your bloodstream.

Mass-4,867,320,000,000,000 billion kg(0.815 Earth)

Equatorial circumference-38,025 km

Known moons-none

Orbit's distance-108,209,475 km(0.73 AU having a orbit period of 224.70 earth days

Fossils

What

• Preserved remains or traces of ancient living things

• Found in rocks

• Types:

  • Body fossils (bones, teeth, shells)

Definition

• Layer of gases

• Surrounds Earth

• Held by gravity

Composition

• Nitrogen – 78%