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.
All living things are made of cells. The cell is the basic unit of life. Cells have systems that allow them to carry out all life processes. Some organisms have one cell and some have many cells. Many-celled organisms have cells that organize internally from cells to tissues to organs to organ systems. There are similarities among organisms. All many-celled organisms are