Answer:
nitrogen
Explanation:
B. are absorptive cells in the small intestine
C. secrete enzymes that kill bacteria
D. are located next to the lacteal in a villus
Animal research is critically important for studying variables that can't be ethically tested in human subjects. Ethical regulations ensure the humane treatment of animal subjects and the minimization of pain and distress. Animal research is a privilege granted by society to researchers.
Animal research is critically important for the study of variables that can't be tested ethically in human subjects. Ethical considerations have necessitated strict regulations on animal research, such as the approval of an IACUC and regular inspections of animal facilities. The use of animals in research is a privilege granted by society to researchers, and efforts are made to minimize pain and distress experienced by animal subjects.
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