hev 100 notes 6-7-07

hev 100 notes 6-7-07 - June 7, 2007 Conception HORMONES:...

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June 7, 2007 Conception HORMONES: chemicals produced by glands (in brain, neck, kidneys, ovaries and testicles) that help regulate physical, mental, emotional, sexual and reproductive processes. TESTOSTERONE: production is an essential function of the testicles; lower levels in women too. It is essen8tial to sperm production and reproduction in both. ESTROGEN: primarily produced in the pituitary gland (men & women), and ovaries in women. Essential to reproduction and ovulation in females; regulates male sexual development. PROGESTERONE: critical for preparing the uterus to sustain a pregnancy. PRENATAL DEVELOPMENT: ZYGOTE: Stage one; fertilized egg. Egg and sperm combine chromosomes; cell division begins. BLASTOCYST: Stage 2. begins when cells replicate to about 32; travels fallopian tubes to uterus (few days after fertilization) STEM CELL STAGE EMBRYO: Stage 3. (Embryonic Stage) begins with implantation into uterine wall. Body systems, organs, structures form. THREE LAYERS
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This note was uploaded on 04/17/2008 for the course HEV 100 taught by Professor Payne during the Summer '07 term at Central Mich..

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hev 100 notes 6-7-07 - June 7, 2007 Conception HORMONES:...

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