Gestation is 9 months in humans. birth and labor can be any length of time
Puberty is when adolescents reach sexual maturity and become capable of reproduction.
<h3>What is an Adolescent?</h3>
An adolescent may be defined as a period of an individual's life who has expired the phase of childhood and are about to enter into the phase of adulthood.
During the time of adolescents, physical and emotional changes occur and are influenced by the endocrine system, which releases hormones into the bloodstream.
In adolescents, puberty characterizes the commencement of adolescence when the reproductive abilities of adolescents evolve.
Therefore, it is well described above.
To learn more about Adolescents, refer to the link:
brainly.com/question/1956818
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Answer:
1) circulatory and respiratory
2) endocrine
3) circulatory
4) circulatory and nerves
Explanation:
I think these are right. Sorry if they are not.
