2 11. A specimen occupies of the field of vision while you are magnifying it usi
ID: 3520984 • Letter: 2
Question
2 11. A specimen occupies of the field of vision while you are magnifying it using oil immersion lens. If you have already measured the diameter the diameter of the scanning lens to be 4 mm, what is the size of the specimen in micro meter? Show your work. 12. At which stage of cell division the nucleolus disappears? What about the centrioles replicate? 13. Explain the following body cavities a. Doral body cavity b. Ventral body cavity c. Abdominopelvic body cavity d. Pleural cavity e. Pericardial cavity 14. Using the four quadrants, Identify the location of bladder Using the nine abdominal recions. Identifv the location of the liverExplanation / Answer
11. So we have to multiply the diameter by this fraction i.e
1/4 ×4 =1 mm
12. The nucleolus disappears during prophase of cell cycle. The centriole replicate at the S phase.
13. A. Dorsal body cavity- it is located along the pisterior surface of body
It contains the spinal and cranial cavitues containig the spinal cord and the the brain respectively
B. Ventral cavity- it is located along the anterior portion of body and it contains the thoracic cavity containing the heart and lunga and mediastinum and abdominopelvic cavity and it contains abdominal cavity containing the digestive tract organs and pelvic organs containing the reproductive system and bladder and ureters etc.
C. Abdomino pelvic cavity --escribed earlier.
D. Pleural cavity- it is present between the parietal and visceral pleura containg the pleural fluid
E. Pericardial cavity- it is present between the parietal and visceral lericardium and contain pericardial fluid
14. The urinary bladder is present in the midline not kn one particular quadrant
15. The liver is present in the right hypochondrium, epigastriuma and right lumbar region.
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