write the role of following
a)Gastric sphincter b) diaphragm c) epiglottis d) 'C' shape cartilage ring in wind pipe e) haemoglobin f) valve in the vein
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Answer:
Gastric sphincter is present at the junction of the small intestines and the stomach.
It acts as a valve and controls the amount of food that is being transferred.
The anal sphincter is responsible for the removal of the food.
Anal sphincter is of two types, internal sphincter and external sphincter
a dome-shaped muscular partition separating the thorax from the abdomen in mammals. It plays a major role in breathing, as its contraction increases the volume of the thorax and so inflates the lungs
The epiglottis is a flap in the throat that keeps food from entering the windpipe and the lungs. It's attached to the entrance of the larynx and stands open during breathing, allowing air to flow into the larynx. But during swallowing, it closes to force liquids or food into the esophagus instead.
The trachea is also called as windpipe. It is a cartilaginous tube which connects pharynx and larynx to the lungs, allowing passage of air. The wall of the trachea is lined by C shaped incomplete cartilaginous rings to protect it from collapsing during the breathing process due to pressure exerted on its walls by the air.
a red protein responsible for transporting oxygen in the blood of vertebrates. Its molecule comprises four subunits, each containing an iron atom bound to a haem group.
Normally, valves in your deeper leg veins keep blood moving forward toward the heart. With long-term (chronic) venous insufficiency, vein walls are weakened and valves are damaged. This causes the veins to stay filled with blood, especially when you are standing. Chronic venous insufficiency is a long-term condition.
Explanation: