Explain the feedback mechanism that control ventilation and circulation to include the peacemaker of the heart

If you have a difficult time knowing where your hand is without looking at it you may be having a problem with your what ?

Which of the following are the functions of the integumentary system? yadda-yadda, the 1st answer is the brainliest. : )

Which of the following statements is most likely correct about a rock belonging to the jurassic age and a rock belonging to the cambrian age? options: 1) they have identical fossils of organisms that have evolved over time. 2) both have animal fossils preserved in them due to weathering and erosion. 3) they contain different fossils because life on earth has changed through time. 4) the fossils in them were formed on the surface of earth due to exposure to sunlight.