You black out and regain your mind once the air and blood get to your brain
Answer:
1. The retina contains three kinds of colour receptors
Explanation:
Young-Helmholtz theory color vision says human can perceive colour due to the presence of colour receptors in the retina that receives colour in various wavelengths
Answer: true .
about 90 percent of people who experience cardiac arrest with cpr immediately die
Answer:
you should not park on a hill
