week 4 male reproductive system

• male reproductive organs are for intercourse, reproduction, and urination
• internal and external

  A) vas deferens

  B) bladder

  C) pubic bone

  D) urethra

  E) erectile tissue

  F) urethra

  G) glans penis

  H) foreskin

  I) testis

  J) scrotum

  K) seminal vesicle

  L) rectum

  M) ejaculatory duct

  N) prostate glands

  O) copwer's gland

  P) epididymis

  
• scrotum - a sac-like pouch located behind the penis that holds each testes and helps regulate temperature for sperm production
• testicles or testes - the two - are small organs that lie in the scrotum and produce sperm and the male hormone testosterone.
• testicles or testes - the - are the male sex gland
• testicles or testes - they are the counterpart to the female ovary
• testicles or testes - impair the function of the other
• testicles or testes - four to five billion sperm cells are produced each month
• testoterone - the male reproductive hormone made by the testicles which causes the changes of puberty
• testoterone - this causes secondary sex characteristics, production of sperm and sexual urge
• sperm - the microscopic cells produced by the male's testicles which can fertilize the female's ovum
• sperm - they are tiny, living cells 100 times smaller thn a pencil dot
• sperm - the smallest cell in a man body
• sperm - enough - would fit on the head of a pin to repopulate the earth if each sperm fertilized an egg
• sperm - it is destroyed by warm body temperature, acidic environment
• sperm - it can survive in a woman's body for 5-8 days
• sperm - any - not ejaculated are passed in the urine
• epididymis - the structure that forms a mass over the back and upper part of each testes
• epididymis - sperm are stored there for as long as six weeks while they ripen to maturity
• cowpers gland - two small pea-sized glands located beneath the prostate gland on the both side of the base of the penis
• cowpers gland - they secrete a clear, sticky fluid that helps to neutralize the acidity of the urethra
• vas deferens - two long, thin tubes that serve as a passage way for sperm and a place for sperm storage
• vas deferens - the contraction of the - along with the action of the cilia help transport the sperm through the -
• seminal vesicles - two small glands that secrete a fluid that nourishes and enables the sperm to move
• prostate gland - surround the urethra beneath the bladder. The gland secretes an alkaline fluid that neutralizes the acid found in the male urethra and the female reproductive tract.
• prostate gland - Without the action of the secretions of the -, many sperm would die and fertilization of an ovum would be impossible.
• urethra - A dual purpose tube that both semen and urine pass through to leave the body. Semen and urine never mix
• urethra - Special muscles or sphincters surround the -
• urethra - DURING URINATION, ONE SPHINCTER WILL RELAX SO THAT THE PRESSURE FROM THE BLADDER WILL PUSH URINE OUT FROM THE BODY.
• urethra - DURING EJACULATION, ANOTHER SPHINCTER WILL RELAX SO THAT SEMEN CAN FLOW THROUGH THE

  URETHRA TO THE OUTSIDE OF THE BODY.
• penis - The male organ for sexual intercourse, reproduction, and urination.
• penis - The reproductive purpose of the penis is to deposit semen in the vagina during sexual intercourse.
• penis - THE HEAD OF THE PENIS OR GLANS CONTAINS MANY NERVE ENDINGS
• penis - AT BIRTH THE GLANS IS COVERED BY A LOOSELY FITTING SKIN CALLED THE FORESKIN.
• penis - WHEN THE PENIS IS ERECT IT IS 5-7 INCHES LONG AN ERECTION OCCURS WHEN THE SPONGE-LIKE CHAMBERS IN THE PENIS FILL WITH BLOOD.
• ejaculation - the passage of sperm from the penis, a result

  of a series of muscular contractions.
• time line:

  infancy - erections begin
• time line:

  ages 11-14 - secondary sex characteristics appear
• time line:

  ages 13-16 - sperm produced in adult amounts ( puberty )
• time line:

  late teens - peak sexual urges for boys