Bacteria is something else that you would need to know
Answer:
Arteries carry blood away from the heart; veins carry blood back to the heart.
Explanation:
In Human anatomy, cardiac cycle can be defined as a complete heartbeat of the human heart which comprises of sequential alternating contraction and relaxation of the atria and ventricles, therefore causing blood to flow unidirectionally (one direction) throughout the human body.
Generally, the cardiac cycle occurs in two (2) stages;
Diastole: in this stage, the ventricles is relaxed and would be filled with blood.
Systole: at this stage, the muscles contracts and thus, allow blood to be pushed through the atria.
The best description for arteries and veins is that arteries carry oxygenated blood away from the heart to other parts of the body such as brain, lungs, tissues, etc; veins carry blood that is low in oxygen content back to the heart.
I think it might be A. By helping them stay healthy enough to work
Answer:
Some internal reasons might be to relieve pain, both physical and emotional as Codeine can induce a high. The high is addictive. Another reason would be for the side effects, such as drowsiness which can feel like a high. An external reason would be weight, as the class of drug Codeine is in is an opioid. Opioids can cause weight loss, and unrealistic standards of beauty may give a teen the want to loose weight.
