The term "human person" refers to a living being who possesses the attributes of personhood, which include self-awareness, consciousness, rationality, and the ability to have subjective experiences and emotions. In the context of human beings, personhood is typically recognized based on the possession of certain cognitive, emotional, and social capacities that distinguish humans from other animals.
From a biological standpoint, a man is a human person because he belongs to the species Homo sapiens. As a member of this species, he shares the common biological characteristics of human beings, such as having a human genetic code, a similar physical structure, and the ability to reproduce with other members of the species.
On a philosophical and ethical level, personhood often involves recognizing the inherent dignity and worth of individuals and respecting their autonomy, rights, and freedoms. Different cultures, societies, and legal systems may have varying criteria for defining personhood and assigning rights and responsibilities to individuals.
The concept of personhood and what it means to be a human person has been a topic of deep philosophical and ethical discussions. Some debates revolve around questions related to the beginning of personhood (i.e., the status of a fetus or a newborn), the end of personhood (i.e., the ethics of end-of-life decisions), and the rights and protections afforded to different individuals at various stages of life.
In summary, a man is considered a human person because he possesses the cognitive and emotional capacities characteristic of personhood and is a member of the human species. However, the deeper philosophical and ethical implications of personhood continue to be subjects of ongoing inquiry and debate.