IDENTIFY AND EXPLAIN IF THE FEEDBACK LOOP OF CIRCULATORY SYSTEM IS POSITIVE OR NEGATIVE
The feedback is negative; when we have a fall in our blood pressure some receptors in our arteries send a signal to the cardiovascular control center in medulla. That makes two things:
1- Heart will increase strock volume and heart rate
2- Blood vessels vasocontriction
That leads to a rise in blood pressure that will return to a normal homeostasis when increased cardiac output and increased system vascular resistance bring blood pressure back to normal
REGULATING BODY TEMPERATURE BY THE HYPOTHALAMUS
Our body temperature is regulated by the hypothalamus that is a part of our brain, through sensors it can check our current temperature and if it is low it makes sure the body generates heat to compense. If on the other hand, our temperature is high, sweat is produced to cool the skin. It is also a mechanism of negative feedback.
CIRCULATORY SYSTEM IS MADE OF BLOOD
It is true that one of it´s components is blood, but it also has the heart and blood vessels.