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What is going on in these pictures?1 2
3 4
Reproduction
Male Reproduction
Male Reproductive Anatomy
Testes and Sperm
• Testes: produce male sperm and male hormones (approximately 100 million /day)
Sperm Production
Sperm Production
• The Sperm cells in the walls of testes mature into flagellated cells (cells with flagella / tails)
Sperm Production
• Mature sperm is transported by the Seminiferous Tubules to the Epididymis which stores the sperm
Sperm Production
• During sexual arousal, sperm is transported from the epididymis through the tubular Vas Deferens, out of the scrotum and into the abdomen and enters the prostrate gland
Sperm Production
• The prostrate gland and the sac-like seminal vesicles add fluid to the sperm
• Semen- combination of sperm, prostate, Cowper’s, and seminal fluid. One drop contains 5-10 million sperm.
Sperm Production
• Inside the prostrate gland the Vas Deferens joins the urethra, the tubular structure that goes through the penis
Sperm Production
• Sperm travels through the urethra and is ejaculated by the penis
• Sperm Production
The Path of Sperm
Female Reproduction
• Labia Majora and Minora- protective folds of skin.
• Urethra- passageway from bladder to outside of body.
• Clitoris- small area of erectile tissue.
Female Reproductive Anatomy
Female Reproductive Anatomy
Ovary and Ovulation
• The Ovaries produce and store eggs
• Eggs develop within a structure called a follicle
• Egg Cell Production
Ovulation
• A mature egg is released from the ovary in a process called ovulation
• Ovulation
The Fallopian Tube
• The egg is transported by one of the fallopian tubes to the uterus
• Eggs are usually fertilized in the Fallopian tubes / Oviduct
• A fertilized egg develops in the uterus
• Cell Division
Female Anatomy
The Placenta
• Nutrients pass from the mother to developing embryo through a membrane called the placenta
• Placenta Formation
The Placenta
The umbilical cord is a cord containing arteries and veins that connect the fetus to the placenta. Kids Umbilical Cord
The Amniotic Sac baby protection
• The amniotic sac is filled up with fluid to cushion and protect the fetus as it grows
• Amniotic Fluid
Menstruation
• If the fertilized egg fails to implant or the egg is not fertilized, extra blood and tissue from the uterus are released through the vagina in a process called Menstruation.
Animation
• Hormones control when girls start menstruating (between 10-14 yrs old) and when women stop menstruating (menopause) at around 50 yrs of age.
• Days1-4 Menstrual discharge
• Days 5-13 Egg develops in follicle. Luteinizing hormone (LH) levels
increase.
• Days 14-15 Ovulation – egg is released from the ovary. (LH levels peak)
• Days 16-22 Egg moves through the fallopian tubes. Uterine lining thickens. (LH levels drop).
• Days 23-28 Unfertilized egg enters the uterus. Uterus prepares to shed its lining (menstruation).
Differentiation
• Multi-cellular organisms such as humans develop different group of cells that take on different functions…this is called Differentiation
• This means that all different cells in the body are different in structure and function
Animation
Next…
A clip of a live birth…
Just kidding…
Do your homework tonight
Normal Conceptionhttp://www.pennmedicine.org/health_info/pregnancy/000005.htm http://health.howstuffworks.com/adam-200112.htm(Intercourse)http://health.howstuffworks.com/adam-200064.htm http://www.icyou.com/video-source/doctors-and-experts/3d-medical-animation-
ovulation+ (ovulation)http://www.britannica.com/EBchecked/topic-video/436140/82853/This-
animation-shows-how-the-human-egg-is-produced-and (both)http://www.pennhealth.com/health_info/animationplayer/
conception_pregnancy.html http://www.pennhealth.com/health_info/animationplayer/kids_birth.html http://www.pennhealth.com/health_info/animationplayer/kids_babies.html