Male Reproductive System Study Guide

Introduction #1 A period of sexual development during which males and females become sexually mature and able to produce children. Between ages 10-15, a males hypothalamus gland tells the pituitary gland to send hormones to the two testes.

#2 Name the Changes that occur to a boy during puberty Facial/Body Hair Deep voice Larger muscles Longer bones Sperm production

Puberty

Structure and Function 3. The ______organs store, nourish, and transport sperm cells Internal

External 4. The _____organs produce, store, and release sperm.

Testes/Testicles 5. Very early in prenatal life, special sex cells are set aside from other body cells. These organize into a group of cells known as ________ which eventually develop in the male testes Gonads

Testes/Testicles 6. The testes have two functions. They produce the male sex hormone___________? Testosterone This hormone is responsible for maturing the reproductive organs and for the development of a male’s secondary sexual characteristics Facial hair Body hair Deep voice, etc.

Testes/Testicles 7. The testes also produce ________. Sperm=Male sex cell

Scrotum 8. The testes hang outside the body within a sac called the ___________ Scrotum

Scrotum 9. The temperature in the scrotum must be ________ than the body temperature for sperm to form and survive. Lower Muscles in the scrotum move the testes closer or farther away from the body to maintain this temperature.

Epididymis 10. This is located on the ______of each testis Back 11. Sperm are stored here for ____to ____ days. 2-4

Vas Deferens 12. This serves as a tube that leads from he epididymis to the urethra.

Vas Deferens Vasectomy: a form of male sterilization where the vas deferens are cut and tied to prevent sperm from meeting the egg. It is a permanent form of birth control.

Urethra 14. The urethra is a tube that carries_______ and _______ from the body. Urine and Sperm It is a passageway located within the penis. During erection, the bladder is closed so that no urine will be eliminated during ejaculation.

Seminal vesicle 15. This organ creates a fluid that provides ________ for active sperm. Energy (sugar) nutrient IT makes up the majority of semen

Cowper’s Gland (bulbourethral gland) Two Small pea shaped structures located on either side of the man’s urethra and beneath the prostate gland

Cowper’s Gland 16. The fluid from this organ________ the urethra. Lubricates (wets) It is sometimes called ________fluid. Precoital It__________ the acid of the urethra. Neutralizes (eliminates)

17.Prostate Gland The Fluid from the prostate gland_______the sperm as it travels in the female reproductive tract. PROTECTS It neutralizes he acid of the vagina. It is also a frequent cancer site in the older male. *2nd most common

Penis 18. The penis is the external sex organ through which sperm leaves the body. 19. The tip of the penis is known as the _______. Glans It is covered by a ___________. Foreskin

Penis ____________= is the removal of the foreskin. Circumcision Two Reasons to have it done? 1. Religious(jewish faith) 2. Health 3. Cultural

21. Bladder This organ stores urine. It receives urine from the kidneys through the ureter tube.

Other Terminology…. 22. A condition in which the penis becomes larger and firm? Erection

23. A fluid that is released from the erect penis during ejaculation. Semen It is made up of: Sperm Prostate Gland Fluid Seminal Vesicle Fluid

???= ejection of semen from the penis?? Ejaculation

25. An ejaculation contains about 360-400 million sperm cells. 26. Once a male reaches puberty, millions of sperm are produced daily.

27._________= an erection and ejaculation during sleep. Noctural Emission It is also called a ______? Wet dream

28. The lifespan of sperm cell once it leaves the penis is__________? 72 hours

29. There are two sperm types. They are labeled as ______ and _______. X and Y If an X sperm cell unites with the egg, a ______ baby will occur. Girl If a Y sperm cell unites with the egg, a BOY baby will occur.

30. The union of sperm and egg in order for reproduction to occur? Also called conception. Fertilization

Sterility 31. When a person is unable to reproduce. Some of the causes are environment, stress, drugs, mumps, etc… Sterility