Download Essentials of Anatomy and Physiology by Elaine N. Marieb PDF

By Elaine N. Marieb

Designed for the one-semester path, necessities of Anatomy and body structure is written to permit teachers the power to complete one major aim: to coach the fundamentals of A&P whereas fostering the abilities of challenge fixing. The textual content specializes in significant topics: 1)the courting among constitution and serve as, and 2)homeostasis.

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What is the purpose of these methods? 16. Define the following cavities: thoracic, abdominal, pelvic, and abdominopelvic. What is the mediastinum? 17. What is the difference between the visceral and parietal layers of a serous membrane? What function do serous membranes perform? 18. Name the serous membranes associated with the lungs, heart, and abdominopelvic organs. 19. Define mesentery. What does the term retroperitoneal mean? Give an example of a retroperitoneal organ. Develop Your Reasoning Skills 1.

As the atoms get closer together, the positively charged nucleus of each atom begins to attract the electron of the other atom. At an optimal distance, the two nuclei mutually attract the two electrons, and each electron is shared by both nuclei. The two hydrogen atoms are now held together by a covalent bond. A polar molecule has positive and negative “ends” that can be weakly attracted to ions or to the “ends” of other polar molecules. Although this attraction is called a hydrogen bond, it is much weaker than ionic or covalent bonds.

Protection. Water is an effective lubricant. For example, tears protect the surface of the eye from the rubbing of the eyelids. Water also forms a fluid cushion around organs that helps to protect them from damage. The cerebrospinal fluid that surrounds the brain is an example. 3. Chemical reactions. Most of the chemical reactions necessary for life do not take place unless the reacting molecules are dissolved in water. For example, sodium chloride must dissociate in water into Naϩ and ClϪ ions before they can react with other ions.

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