Diff: 2 Page Ref: 685-686. 18) If the vagal nerves to the heart were cut, the result would be that ________. A) the heart would stop, since the vagal nerves trigger the heart to contract. B) the heart rate would increase by about 25 beats per minute. C) the AV node would become the pacemaker of the heart.
Living things have seven essential processes in common:  movement, respiration, sensitivity, growth, reproduction, excretion and nutrition. All things fall into one of three categories: living, used to be living or not living; the presence of all seven life processes indicates a living thing.
Single-celled organisms perform all of the life processes needed to maintain homeostasis, by using specialized cell organelles. Living things have different levels of organization. The simplest level of organization is that of the cell. A group of cells with a similar function is called a tissue.he blood vessels, blood, and the heart are organs which work together to form the circulatory system. Many different systems function together to allow a complex organism to function. Cell Structure Cells have particular structures or organelles that perform specific jobs.