1. Understanding Human Development
Chapter 3
Understanding Human Development

2. Introduction Video to Chapter 3
Things you’ll learn:
Changes that occur in the human body to prepare for reproduction
Pregnancy
How one cell changes into a living organism
Science & technology

3. What is the Gestation Period?
It is the time that is needed for an animal to develop before birth
Reference pg. 79

4. Reproductive System Ch. 2 review: male & female gonads produce gametes
What makes the gonads start producing gametes? Pg. 80
Drummmmm rollllllll….
HORMONES

5. Humans & Puberty When does puberty begin? Early to mid teens
What happens to the human body at this point?
Hormones signal to pituitary gland in brain to start producing the hormone follicle stimulating hormone (FSH)
Signals are sent to testes in males and ovaries in females to begin sperm and egg production

6. Puberty in Males Testes begin to produce the hormone what?
Testosterone
Sperm will be produced for a males entire life

7. Puberty in Females
When hormone FSH is sent to ovaries, they become stimulated to begin maturing & release eggs and this is called your period.
Females continue to produce the hormone? (pg. 81)
Estrogen

8. Another line graph… 
Look at pg. 81 in yellow

9. The Male Reproductive System
T-chart time… (draw a t-chart on the board) pg. 82
Main purpose of the male reproductive system is what?
To produce as many healthy sperm as possible… but in most cases only 1 sperm from millions will reach an egg to fertilize it to reproduce

10. Female Reproductive Anatomy
Ovaries: Located on both side of a female’s main body cavity
Ovum (egg) is released approx. every 28 days
This process is called ovulation
The ovum is headed to the uterus where it can live up to hrs
If egg is not fertilized by sperm; it will die and menstruation begins

11. Con’t The uterus is an organ What is the purpose of the uterus?
Fetal development happens aka a baby will grow & develop
Pregnancy tests detect a hormone known as luteinising hormone (LH)
Hormone progesterone & LH will provide the support for a developing fetus & baby

12. Con’t Rigorous activity may delay puberty in females Why?
Fat deposits are small, lack of estrogen production
Low body fat can impact bone density that can lead to the decline in estrogen which stops menstruation