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"[initiation's] function is to reveal the deep meaning of existence to the new generations and to help them assume the responsibility of being truly men and hence of participating in culture." "it reveals a world open to the trans-human, a world that, in our philosophical terminology, we should call transcendental."
This has shaped human evolution for many years, but reasons why humans choose their mates are not fully understood. Sexual selection is quite different in non-human animals than humans as they feel more of the evolutionary pressures to reproduce and can easily reject a mate. [ 2 ]
Hormonal control of spermatogenesis varies among species. In humans the mechanism is not completely understood; however it is known that initiation of spermatogenesis occurs at puberty due to the interaction of the hypothalamus, pituitary gland and Leydig cells.
Initiation/Motor: Observers must be physically and/intellectually capable of producing the act. In many cases, the observer possesses the necessary responses. In many cases, the observer possesses the necessary responses.
Puberty is the process of physical changes through which a child's body matures into an adult body capable of sexual reproduction.It is initiated by hormonal signals from the brain to the gonads: the ovaries in a female, the testicles in a male.
For example, humans undergo a single-celled bottleneck in that the haploid sperm fertilizes the haploid egg, forming the diploid zygote, which is unicellular. This passage through a single cell is beneficial in that it lowers the chance of mutations from being passed on through multiple individuals.
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The various phases of the life cycle were described by David Lancy [2] as belonging to six practical categories: 1) Birth and early infancy, which Lancy describes as ritually being the least important given the doubt over the child's survival; 2) Joining the community when the infant's survival is confirmed, usually denoted by a naming ceremony ...