Get Informed Topics Your Body Puberty MAJOR CHANGES IN BOYS DURING PUBERTY


During puberty, boys develop a more adult body shape. 

They get taller, with wider shoulders and a more muscular body. 

Boys grow new hair in many parts of their bodies—arms, legs, genital area, chest, abdomen, back, and face. 

Their vocal cords get thicker, making their voices deeper. 

A boy’s penis and testicles grow, and his testicles start producing sperm. 

Around this time boy starts experiencing erections or the swelling and hardening of the penis, both voluntary and involuntary, and ejaculation or the discharge of semen from the penis.

Male reproductive organs



The mons pubis is the fatty tissue covering the pubic bone or the bone located in the lower abdomen just above the sexual organs. 

Due to increased hormone levels during puberty, the amount of fat increases, making the mons pubis more prominent, and hairs start covering the area. 

The mons pubis acts as a shock absorber between the man and woman’s pubic bones during sexual intercourse.


The penis is the male sexual organ. It also acts as a conduit for urine to leave the body. 

The penis two main parts are the shaft or the body of the penis and the head.  

When the men become sexually excited blood rushes to the penis and causes the spongy tissue in the shaft to swell. 

The penis becomes longer, larger, and harder, and it sticks out away from the body.


The shaft is the main portion of the penis. It runs from the pubic bone to the head (glans) of the penis. 

The shaft is primarily made of three cylinders of sponge-like tissue that fills with blood during arousal, causing an erection—enlargement, lengthening, and hardening of the penis.


The glans, or glans penis, is the outermost portion of the penis. It is often referred to as the head. The size and shape of the glans vary. 

In some men the glans is larger than the shaft, creating a mushroom-like effect, while in other men it is smaller than the shaft or similar in size. The rounded base of the glans is called the corona.

The glans is the most sensitive part of the penis, due to its high concentration of nerve endings. 

At the tip of the glans is an opening called the urinary opening, or meatus. This is where urine, semen, and pre-seminal fluid exit the body.


The rounded base of the glans (penis head) is called the corona. The corona is a very sensitive part of the penis.


In both men and women, the urethra is a narrow tube that connects the bladder and the genitals. 

In men, the urethra is approximately eight inches long and runs through the penis to its tip. It serves as a canal for urine, semen, and pre-seminal fluid.


The strip of skin that attaches the foreskin to the tip of the penis is called the frenulum. It is also one of the most sensitive parts of the penis, thanks to its high concentration of nerve endings.


The foreskin is the unattached, retractable part of the penis’s skin. 

In uncircumcised (uncut) men, it covers the penis head (glans). 

When the penis is flaccid or relaxed, the foreskin can be long enough to cover the entire head and hide the urinary opening, or it can be a little shorter, leaving a small portion of the head uncovered


Testicles are olive-shaped glands—there are typically two—inside your scrotum or the skin sack below your penis. 

The testicles’ primary function is to produce sperm. They also produce the male sex hormone. 

Usually one of the testicles hangs lower than the other, but it is also normal for them to hang at the same level. 


The scrotum is the sack of skin hanging below the penis. It contains the testicles. 

The skin of the scrotum reacts to external temperatures in order to keep the testicles at the temperature required for producing sperm. 

When it is very cold outside, the skin contracts to keep the testicles closer to the body. 

When it is very hot, the skin relaxes, allowing the testicles to hang away from the body and release extra heat.

As with other body parts, no two scrotums are equal. Normal scrotums vary widely in size, color, and amount of hair.


The perineum is the area of tissue that extends from the genitals to the anus. In men, it goes from the base of the scrotum to the anus.

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