1. Male Reproductive System

2. Male Reproductive System
Testicles: produce sperm (male sex cell), and testosterone
Epididymis: network of tubes behind testicle which store sperm cells
Vas Deferens: passageway tubes that extend epididymis to urethra, where sperm exits
Scrotum: keeps sperm cool
Semen: fluids and sperm mixture exits penis through ejaculation 2

3. Secondary Sexual Characteristics - Male
Produced by testosterone
Deeper voice
Chest and facial hair
Lengthen bones
Increased size of testes for sperm production

4. Female Reproductive System
Mrs. Degl

5. Female Reproductive system
Key functions: store and release eggs, role in creation of offspring, to give birth.
Fertilization: this occurs when a sperm cell joins with a female’s egg cell.
Ovulation: the release of one egg cell per month (about 28 days).
Menstruation: when the lining of the uterus, unfertilized egg, and blood flow out of the body.
Menstrual cycle: hormonal changes that occur from the beginning of one menstruation to the next (28) 5

6. Ovaries: contain ova, or the eggs, and produce hormones
Fallopian tubes: carry eggs from ovaries to uterus
Uterus: shelters and nourishes fetus
Cervix: opening of the uterus
Vagina: muscular passageway from the uterus to the outside of the body 6

7. Secondary Sexual Characteristics - Female
Induced by increased LH, FSH, estrogen, and progesterone hormone levels
Pubic hair
Widen pelvis
Enlarge mammary tissue (breasts)
Begin menstrual cycles

8. Fertilization Occurs in upper 1/3 of Fallopian tube
Only 1 sperm can fertilize an egg
Fertilized egg = zygote
An average woman is pregnant (gestational period) for 9 whole months. That is 40 weeks. Babies can survive if they are born earlier, but they may have complications due to being premature.

9. Implantation Fertilized eggs are implanted into thick walls of uterus
Chorion membranes dig into uterus to form placenta
Zygote grows into an embryo
Embryo gets air and nutrients through the umbilical cord
Once pregnant, progesterone levels stay high in mom
Mom’s uterus grows with the baby

10. 1st Trimester = 1st 12 weeks Heart develops first Neural tube develops
All body systems appear by Week 8 – Now a Fetus

11. 2nd Trimester = up to 24 weeks
Most growth
Looks more like a baby
Some preemies survive at this stage

12. 3rd Trimester = Up to 40 weeks
More growth
Kicking, rolling, stretching
Eyes open – Week 32
Lungs mature
Rotates to head-down
position, unless baby is breech

13. Birth Labor Uterine contractions begin Cervix dilates to 10 cm. Birth
Uterus pushes baby through vaginal canal
Placenta delivered after baby
Cesarean Section (c-section) is a surgery that cuts through the uterus to deliver the baby if it cannot be born vaginally

14. Human Growth Stages Infancy: Birth-2years Childhood: 2-13 years
Adolescence: 13-18/20 years
Adulthood: 20 years until death