2. the earth and mars are? 3. this is a line on a map that goes from north to south? 4. this is an imaginary line on a map that goes from east to west? 5. is the force that makes planets spherical. 6. this is a line of latitude that is degrees? 7. a circle has because when you cut it in half , onr side is a mirror image of the other side. 8. half of the earth is called a

5. gravity

6. I didn't know what that question was asking.

7. symmetry

8. hemisphere

c is the correct answer!

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.