Answer:
1) A cardiovascular system is an organ system that conveys blood through vessels to and from all parts of the body, carrying nutrients and oxygen to tissues and removing carbon dioxide and other wastes.
2) "Capillaries connect the arteries to veins. The arteries deliver the oxygen-rich blood to the capillaries, where the actual exchange of oxygen and carbon dioxide occurs. The capillaries then deliver the waste-rich blood to the veins for transport back to the lungs and heart. Veins carry the blood back to the heart."
3) A heart attack is a blockage of blood flow to the heart muscle.
Entrepreneurship is the process of designing, launching and running a new business. Example- a startup company offering a product, process or service.
Answer:
In my opinion, sleepwalker is much alike to daydreaming.
Explanation:
Your mind is somewhere else but your presence is in a place you do not know you're still in. In life, we are sometimes sleepwalkers; not literally walking while asleep, but continuously going with the flow of life without knowing the purpose why you are still striving to live everyday. And I think it's normal, it happens to everyone. Maybe time will come you'll also realize your purpose.