Valves are like flaps or lids that are used to transport blood from the atria to the ventricles. They act as inlets and outlets of blood.
Explanation:
The atrioventricular valves are located Left and right that are in the middle of atria and ventricle on both sides of the heart while two semilunar valves separate the right and left ventricles from the pulmonary valve and aortic valve.
The Atrioventricular valves are the mitral valve and the tricuspid valve. Mitral valve is in the left side and tricuspid valve is in the right. they both are separated by the atrium and ventricle
The two semilunar valves are the pulmonary valve and aortic valve. the pulmonary valve is on the right side separated by the right ventricle and pulmonary artery. The aortic valve is on the left and is separated by the left ventricle and aorta.
Peristalsis in the Esophagus event triggers the opening of the gastroesophageal sphincter.
<u>Explanation:</u>
- In the esophagus, there are two types of peristalsis occurs.The first one is a "primary peristaltic wave" occurs through which bolus enters esophagus during swallowing.
- This "wave pushes the bolus down esophagus", into stomach in a wave lasting about 8–9 seconds.
- The esophageal sphincter in the lower region is separated by both sympathetic and parasymphathetic nerves.
- The pathways of vagal are a major for the relaxation of reflex of LES and this occurs in LES relaxations.
