Primary and secondary sexual characteristics refer to specific physical traits that set apart males and females in sexually dimorphic species; that is, species in which the males and females look different from each other. Primary sexual characteristics are there from birth for example, penises vs. Secondary sexual characteristics emerge at puberty such as low voices and beards in human males, and high voices and no facial hair in human females. Primary and secondary sexual characteristics are physical traits that make males and females look and behave differently from each other in certain species, including humans. Secondary sexual characteristics appear during puberty. These characteristics are not used in sexual reproduction, but are important for attracting a mate - such as long tusks or brightly colored scales - or being able to provide care for offspring - such as human breasts or marsupial pouches.
Secondary sex characteristic
Primary & Secondary Sexual Characteristics | Sciencing
As a member, you'll also get unlimited access to over 79, lessons in math, English, science, history, and more. Plus, get practice tests, quizzes, and personalized coaching to help you succeed. Already registered? Log in here for access. Log in or sign up to add this lesson to a Custom Course. Log in or Sign up. Jim has a master's degree in secondary Education and has taught English from middle school level to college.
Primary & Secondary Sexual Characteristics
A characteristic, such as breast development, voice pitch, or facial hair, that distinguishes the sexes from each other but is not directly concerned with reproduction. The appearance of these characteristics is influenced by hormones. This windfall of words will make you rich with knowledge. Mine your memory on the words from July 27 to August 2! Also called secondary sex character.
In view of the complexity of the process of growth and maturation, it is not surprising to find great variations among normal boys as to the time of onset of pubescence, the rate of development and the ultimate size of the genitalia. This study was undertaken in an attempt to ascertain the actual variations among normal boys and men as to the size of the testes and of the penis and the degree of development of secondary sexual characteristics. The primary sexual organs are essentially the gonads, but we shall accept the broader classification, which includes all the organs required for procreation. These in males are the testes, the epididymides, the seminal vesicles, the prostate and the duct systems. In children these primary sexual organs differ considerably in size and structure from those of adults, since they do not as yet exercise their specific function.