The physical changes during puberty are due to <u>secondary sex characteristics</u>
Explanation:
Origin: Secondary sex characteristics in male typically originate at the onset and develop during puberty from 9-16 years.
Mechanism: The hypothalamus of the brain initiates the release of follicular stimulating and leutinizing hormones which trigger the Sertoli cells of the testes to begin spermatogenesis and the interstitial cells of Leydig to produce the male sex hormone testosterone.
It is this release of testosterone that leads to the development of secondary sexual characteristics like:
- Muscular and strong body
- Deepening of voice
- Growth of facial, axillary (underarm) and pubic hair
- Enlargement of reproductive organs like the scrotum, testes, etc; along with penis lengthening
- Spermatogenesis begins along with feelings of sexual drive during this adolescent period
.
Answer:
C) weight = 3500 g, length = 20 inches (51 cm), head circumference = 34 cm, and chest circumference = 32 cm
Explanation:
A normal newborn that was born on term should be weighing between 2500g and 4000g, the expected length should be between 19 to 21 inches (48 to 129 cm), the head circumference should be between 33 to 35 cm, and the chest circumference is expected to be between 30.5 and 33 cm.
Answer:
really nothing we dont do that anymore
Explanation:
Answer:
tom adnd jerry they like cats but who doesnt
