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:
Right atrium, right ventricle, left atrium, and left ventricle.
Answer: c. Internal statistics
Answer:
Being healthy is a positive trait. But i don't think it is realistic at a young age. But if it's a high school maybe.
Explanation:
Cardiovascular fitness !! anything involving the heart / heart exercises are considered cardio !! hope this helps
