Systemic circuit is defined as one of the two circuit of circulation that occurs in human body.
<h3><u>Explanation</u>:</h3>
The circulatory system is divided into two phases in the human body. They are:
A. Pulmonary circulation
B. Systemic circulation.
The pulmonary circulation is the short circuit of circulation that starts from the right ventricle, goes to lungs via pulmonary artery and returns to left auricle via pulmonary vein.
The systemic circulation is the bigger circuit that starts from the left ventricle, goes to each and every organ of the body via aorta, and returns to the right auricle via venacava.
Endocytosis. That is the process of the intake of food by creating a vesicle.
Student 2 because a proton is what identifies a atom and student to is the only one who has that under the list. Plus the valence electron is right as well
It is not C because animals use cellular respiration to transfer CO2 into Oxygen in the mitochondria.
It could be considered A because in food chains, plants are the primary producers of food chains. These primary food chains go through photosynthesis in order to "breathe" and make food. So the best answer to me is A.
*Though, if you dig deeper, the process that occurs in most ecosystems could be the answer because most ecosystems have plants because plants are the bottom of the food chain, without plants, there is no oxygen for the mammals to breathe. **** Ask your teacher/professor upon this question and be sure to include the main points in my conclusion.