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the male reproduction organ consists of internal and external genitalia as follows
3 Vasa deferentia
4 seminal vesicles
5 prostate land
6 cawper’s gland
7 Ejaculatory ducts
2 Scrotal sac inal genitalia
there is a pair of oval testis situated in a muscular sac outside the abdominal cavity. the scrotum each testis is about 4 – 5 cm long 2.5 cm wide and 3 cm thick.they are suspended in the scrotum by spermatic cords during, the fetal life testis are stimulated in the abdominal cavity each testis is surrounded by double walled tunica vaginal follow by tunica albuginea and vasculosa.
it is fine tubule of about 5 to 6 m long called and packed to form and elongated nad flattened structure called testis in the attachment .
two differentials are present in male one arising from another from each testis the vas deference is formed when epidemics unite to form a single tube the vas deffernce or spermatic cord is staring tube extending from the epididymis to ejaculatory duct.
a pair of seminal vesical is situated I n urinary bladder . they are fibro muscular pouched lined with columnar epithelium.
it is suited below the urinary bladder and surrounds the 1st part of urethra it is composed of a large number of glandular cell or columnar epithelium.
one pair located beneath the prostate gland, secrete alkaline mucus helping in lubrication.
an apir of the ejaculatory duct is present. each ejaculatory duct is about 2 cm long formed by the union of the duct from the seminal vesical and a vas deferens it join to the urethra and carry seminal fluid and spermatozoa to the urethra.
it is originally urinary duct of the urinary bladder.It about 19 to 20 cm in length.It is the common pathway for urine and semen. it can divide into three parts prostatic urethra. that passes through the prostate gland the middles is membranous urethra that is short and extends through the prostate gland of the bulb of the penis .The last part of the urethra is called" penile urethra" which is situated inside the penis and opens outside through the urethra is through urethral orifice.
it is external genitalia of the male reproductive organ .Tthe penis is made up of three cylindrical masses running through the entire length. the cylindrical masses are composed of erectile tissue and smooth muscles the 2 lateral masses are called" corpora cavernosa". the urethra is situated inside the middle mass called corpus spongiosum. All three masses are highly supplied with blood vessels the outermost or tip is called the gland penis.
almost bilobed a scrotal sac is present behind the penis or at the upper region of thigh .in adult sac looks hairy dark skinned pouch.
it the time in which male growth hormone stimulates for the 1st time creating growth of his reproductive system which takes in age of 12 to 14 age.
Agrawal, sarita. principle of biology. 2nd edition . kathmandu: Asmita book Publication, 2068 ,2069
Mehta, Krishna Ram. Principle of biology. 2nd edition. kathmandu: Asmita, 2068,2069.
Jorden, S.L. principle of biology. 2nd edition . Kathmandu: Asmita book Publication, 2068.2069.