Write one function for each of the following. (i) Larynx (ii) Pericardium (iii) Peristalsis (iv) Pulmonary vein (v) Xylem parenchyma
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Answer:
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Explanation:
1. The larynx serves to protect the lower airways, facilitates respiration, and plays a key role in phonation
2. The pericardium acts as mechanical protection for the heart and big vessels, and a lubrication to reduce friction between the heart and the surrounding structures. A very important role in all aspects of pericardial functions is played by mesothelial cells.
3. Peristalsis is a series of wave-like muscle contractions that move food through the digestive tract. It starts in the esophagus where strong wave-like motions of the smooth muscle move balls of swallowed food to the stomach.
4. The lung veins sometimes referred to as the pulmonary veins, are blood vessels that transfer freshly oxygenated blood from the lungs to the left atria of the heart.
5. The main functions of xylem parenchyma include: Storage of food material in the form of starch, fats, tannins and crystals.
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