Practice check: For everyday science, which organ pumps blood around the human body?

✅ D. Nitrogen

a: Oxygen | b: Carbon dioxide | c: Argon | d: Nitrogen Read more

✅ A. Ozone layer

a: Ozone layer | b: Mantle | c: Troposphere only | d: Inner core Read more

✅ A. Ozone layer

a: Ozone layer | b: Inner core | c: Troposphere only | d: Mantle Read more

✅ B. Immunity

✅ D. Heart

The heart pumps blood through the circulatory system. Read more

✅ C. Ole Roemer

✅ C. Carbon dioxide

a: Hydrogen | b: Nitrogen | c: Carbon dioxide | d: Oxygen Read more

✅ C. Neon and argon