The circulatory system
Roots have a big surface area and thin walls, which allow water to pass into them easily and the roots are very long they go down and down under the soil to find water.
*Its cellular respiration* The alimentary system, or the process of digestion. Consumption, inhalation (for some), choking (down wrong pipe), devouring, snarfing, stuffing the cake hole, etc!
Making careful sketches and Taking careful measurements
A paramecium is more comparable to a whole human body than a single human cell. It contains the entire digestive stsyem (which for a paramecium, is simply taking in food, taking out nutrients and expelling waste). For a human cell, it is completely reliant on the respitory, digestive, and circulatory system. In order, one is used to obtain and get rid of gases, one is used to break down food, and the last is used to deliver both to the cells. Many singly cell or simple multi-cellular cells can, if needed, absorb gases through osmosis as they are so small, there waste is easily removed, food does not need to be transported and digestion is simple. Therefore, the paramecium does not have to deal with all the complexities the human cells must to survive.
Cultural Variables Are Accept ambiguity Tolerate the impractical Have low external controls Tolerate Risk Taking Tolerate conflict Focus on ends rather then means Develop an open-system focus provide positive feedback
http://wiki.answers.com/FAQ/6462excretory
respiratory
The main functions of the circulatory system in the human body are the delivering of food to the cells, delivering of oxygen from the lungs to the rest of the body, the taking of Carbon Dioxide from the cells and taking it to the lungs and the transportation of blood proteins and hormones to the different organs and systems.
digestive and excretory
Respiratory system
The respiratory system functions to bring oxygen into the body and make it available to the cells, and to remove carbon dioxide from the cells and expel it. The cardiovascular system works with the respiratory system by picking up the inhaled oxygen and delivering it to the body's cells, and by taking carbon dioxide from cells and delivering it to the lungs to be exhaled.
Mainly in the small intestine. A small amount of absoprtion of nutrients can also take place in the stomach and large intestine.
we breathe in oxygen and we release carbon dioxide
Most nutrients are just dissolved in the plasma of the blood. They are transported to the cells when the heart pumps the blood through arteries, arterioles and capillaries. Nutrients diffuse through the walls of capillaries and enter cells.
Delivering the food and taking order .
TPN, or total parenteral nutrition, is taking in nutrients through a small vein. It is used when a patient can't tolerate nutrition via the digestive system.
Taking in nutrients and rendering the nutrients in a form the body can use for energy, growth, and good health requires the digestive process. The correct answer should be "Digestion"