The answer is because when the heart pumps blood in the artery during systole it counteracts the resistance provided by the blood vessels. This requires high pressure that is provided by the force of ejection due to the contraction of the ventricles. On the other hand, the pressure is lowest during diastole which is the ventricular filling of blood. There is low resistance in the blood vessels and the arterial wall pressure declines until the heart starts to contracts again.
Answer:
Orbicularis oris
Explanation:
Orbicularis oris muscle is present in the lips. These muscles may lie horizontally or vertically with other muscles.
Orbicularis oris is the circular muscle that encircles the mouth. This muscle is also known as kissing muscle. Orbicularis oris muscle originates from the maxillae and mandible and innervated by the facial nerve. This muscle inserts in the lips margin.
Thus, the correct answer is option (B).
This is a difficult question to answer with the given information...could you add more
<span>The first step of cellular respiration is glycolysis. The term glycolysis literally means splitting sugar. During the process, a molecule of glucose is broken down to yield ATP, pyruvic acid and NADH. The citric acid cycle of cellular respiration takes place when oxygen is present, although oxygen is not used.</span>