what is going on in these pictures? 1 2 34. reproduction

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