For many of their illnesses scientist and doctors haven't treated them before so they don't know how to treat them or exactly if the animal can handle the treatment
The *heart* is the main organ of the circulatory system.
The circulatory system consists of three independent systems that work together: the heart (cardiovascular), lungs (pulmonary), and arteries, veins, coronary and portal vessels (systemic). The system is responsible for the flow of blood, nutrients, oxygen and other gases, and as well as hormones to and from cells.
Rain is the correct awnser
Answer:
Correct option is D. (All of the above)
Explanation:
Consequences of obesity, and overweight increase the risk of lots of health problems such as heart disease, diabetes, high blood pressure, and sometimes death as well.
Overweight occurs when a human body mass index is more than 25. It is caused by the taking more calories than are burned by everyday activities or exercise.
