A zoological work that examines the `parts` involved in the (common body and soul) functions of reproduction. Books III-V: Continuation of observations on reproduction. The genesis of the male and the genesis of the female. The offspring in relation to the parents. Heredity, teratogenesis, characteristics by which the parts of animals differ. Differences in sensory organs.

Aristotle, son of the physician Nicomachus, was born in Stageira in 384 BC. There is little information about the early years of his life. At the age of seventeen, he went to Athens to study at the Platonic Academy. He stayed there for twenty years, from 367 to 348 BC, until Plato died. At that point, Aristotle left for Assos in Troas and after a three-year stay there, he went to Lesbos and subsequently to Macedonia, where he took on the education of the royal heir Alexander.

When his student ascended to the throne, Aristotle settled in Athens and founded his school, the Lyceum. After the death of Alexander (323 BC), the philosopher's stay in Athens became difficult. He was forced to flee to Chalcis, his mother's homeland, where he died in 322.

A universal spirit, Aristotle created a vast and valued body of philosophical and scientific work. Epistemology, logic, theology, physics, biology, psychology, ethics, political philosophy, and aesthetics are the main fields of knowledge that he researched and studied. The Alexandrian Hermippus estimated Aristotle's works to number 400. To this day, lists have survived that include 143 titles of his works.

Diogenes Laertius estimated the number of verses in Aristotle's writings to be 440,000. The impact of his work on the formation of world thought has been strong for centuries and remains so.

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