Introduction to the Male Structures

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Male Reproductive System

• Introduction to the Male Structures
• Diagram 18.2 page 470
• Path of Sperm
• Problems of Male Reproductive System
• Care for the Reproductive System
• Concept Mapping Activity
• Quiz next class

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Male Reproductive Structures

• DO NOW
• Define Reproductive System
• List as many Reproductive Structures in the male
  body as you can

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Reproductive System

• Major Functions
• Production of sperm
• Storage of sperm (male reproductive cell)
• Time of puberty pituitary gland releases hormone
  that stimulates production of testosterone
  (responsible for physical changes)
• Fertilization the joining of male sperm and
  female egg

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MALE Reproductive System
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Male Reproductive System
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External Male Reproductive Organs

• Scrotum- an external skin sac that holds the
  testes
• Testes- (singular Testis) also called testicles
• two small glands that produce sperm
• Produce hormone testosterone
• Sperm cannot live above normal body temp Skin
  of scrotum keeps the testes slightly below body
  temp muscles in the scrotum relax or contract to
  control temp

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Penis

• Penis external organ used for intercourse
  contains three cylinders which become filled with
  blood to increase in size and fullness
• Glans smooth sensitive end of the penis
• Foreskin fold of skin covering the head of penis
  

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Quick Fact

• The singular word for testes is testis, from
  Latin meaning to witness. During ancient times,
  a person providing testimony would validate it by
  holding his testes or another mans!!

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Internal Organs

• Seminal Vesicle
• seminal fluid originates in seminal vesicle
• Provides nutrients and energy to the sperm as it
  travels through the vagina
• Vas Deferens
• (ductus deference) move sperm
• connect the epididymis to the ejaculatory duct
• Prostate Gland
• Size of walnut is below the bladder
• Release nourishing fluid for sperm travel during
  ejaculation

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Internal Organs Male Reproduction

• Cowper's Gland
• Two tiny glands located below prostate,
  neutralize semen
• Releases pre-ejaculatory fluid
• Fluid cleanses urethra to protect sperm from acid
• Epididymis-
• Tightly coiled tube connecting to vas deference
• Stores mature sperm
• Urethra
• Passage way for semen and urine to leave the body
  
• Urinary bladder
• Storage of urine until excretion

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Life Travels of Sperm

• 1. Produced in testes
• 2. Stored in Epididymis
• 3. Released into the Vas Deferens
• 4.Passes seminal vesicle
• 5. Passes prostate gland
• 6. Now Urethra passes Cowpers gland
• 7. travels down the penis and out of the body

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Sperm!!!

• Head Contains genetic material
• Acrosomal Sac- above head contains digestive
  enzyme so can penetrate ovum
• Neck contains mitochondria energy for sperm to
  swim
• Tail side to side movement to propel sperm
  through the vagina into the uterus

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Sperm fun facts

• Males remain fertile and produce sperm
  throughout their life
• 300 400 million sperm in each ejaculation
• Sperm swim 30 inches per hour
• Sperm make up 5 of what males ejaculate
• Sperm can live up to 5 days in fertile cervical
  fluid

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Care for Male Reproductive System

• Get regular check-ups
• Go to doctor every 12 18 months
• Bathe regularly
• Wear protective equipment
• use protective cup or supporter during physical
  activities
• Perform regular self-examinations
• Check for any changes
• Practice safe sexual activity or abstinence
• Use protection or abstain from intercourse

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STDs effecting male reproductionCommon yet
basic STIs

• Chlamydia/gonorrhea
• Bacterial infections cause burning during
  urination.
• Syphilis
• Bacterial infection initially painless, then red
  sores appear
• Genital Herpes
• Virus blister like sores in genital area

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Reproduction Problems

• Inguinal Hernia
• Separation of tissues allows intestine to push
  into abdomen near top of scrotum
• Symptoms lump in groin near thigh, pain in
  groin severe case partial or complete intestinal
  blockage

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Reproduction Problems

• Sterility Inability to reproduce results from
  too few sperm less than 20 million per
  milliliter of seminal fluid
• Results from environmental hazards
• Exposure to X rays
• Radiation
• Toxic chemicals
• Lead
• Anabolic steroids
• Drugs
• Hormonal imbalance
• STDs