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Full-Text Articles in Physiology
Lead-Poisoning From Environmental Contamination, A. Karim Ahmed, George Bloom, Clifford A. Ottaway
Lead-Poisoning From Environmental Contamination, A. Karim Ahmed, George Bloom, Clifford A. Ottaway
Journal of the Minnesota Academy of Science
Geochemical studies demonstrate large-scale increases of lead in the general environment. A principal source of this contamination has been traced to the use of tetraethyl lead in gasoline. It is not clear at the present whether these increased levels of lead cause chronic insult to the general population. On the other hand, lead poisoning in young children because of lead based paint flakes in deteriorating housing has been well-documented in many inner-city areas. Between 5 and 10 percent of children (between the ages of one and six) living in sub-standard housing in Chicago, Cleveland, and Baltimore show symptoms of lead-poisoning. …
The Use Of Different Embryos In Studying The Development Of Man, John C. Bartone
The Use Of Different Embryos In Studying The Development Of Man, John C. Bartone
Journal of the Minnesota Academy of Science
The early development of man (embryology) is generally taught with the use of embryos of different animals. Human embryos are seldom used. This is true in the medical, graduate and undergraduate curricula. The primary reason for this utilitarian approach is simply because human embryos are generally not obtainable in numbers sufficient for the wide distribution necessary for all colleges and universities. Another reason is that fairly good substitutes are available to exhibit the early embryological stages of development of man. Some of these substitutes are embryos of the chick, frog and pig.