Examlex
Based on cross-cultural research in which people from different cultural backgrounds are shown pictures of facial expressions and asked to identify the emotion that is being expressed, researchers have now concluded that:
Conception
The process of a sperm fertilizing an egg, leading to the formation of a zygote and the beginning of pregnancy.
Prenatal Period
The time from conception to birth; the developmental period occurring before birth.
Sexual Characteristics
Traits that distinguish between males and females within a species, often divided into primary (related to the reproductive system) and secondary (such as breast development or facial hair) characteristics.
Lungs
Pair of respiratory organs situated in the chest, responsible for gas exchange between air and blood.
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