This question is answered within itself.
*SPOLIERS* He destroys his heart and falls into a deep sleep, so he finds refuge inside Sora's heart.
Your heart beats slowly when you sleep.
no your heart don't make you sleep
no
May be or may not be. If you are calm with yourself, your heart rate will come down. It may go up, sometimes to very high level. It is common to get heart attacks during the sleep. You may get nightmares, which may lead to heart attack.
Slow tempo will decrease your heart rate because it might put you to sleep and that would rest your heart rate.
spoiler it was because he fought with his dark self vanitas in a fight for his heart and friends and in doing so he lost his heart which is lost some where in between the relms of light and dark.
It takes a lot of energy to grow a baby inside of you. You also have 50% more blood which the heart have to pump around.
Cows can and will sleep anywhere they like whenever and however they feel, or whatever their daily routine entails. If they want to sleep inside, they'll sleep inside. If they want to sleep out, they'll sleep out.
When you become active, you need more of oxygen and nutrition for muscle cells. So heart pumps more blood to meet the requirement.
yes because my grandfatherhad one and he woke up and he had heart problems
If you are having trouble sleeping at night you can get yourself to sleep by drinking warm milk or chamomile tea