인간의 생식과 발생

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인간의 생식과 발생에 대한 보고서 자료입니다.

목차

A. Male Reproductive System
Testes
Epididymis(부정소)
Vas deferens(수정관)
Urethra(뇨도)
Seminal vesicles(저정낭)
Prostate gland(전립선)
Bulbourethral glands
B. Female Reproductive System
Ovaries (난소)
Follicle(난포)
Fallopian tubes(나팔관)

본문내용

o males (SRY gene is activated in week 7).
XX embryos develop into females
Digestive & respiratory systems are last to mature.
6. Labor and Birth
Occurs ~266 days post-fertilization (280 days from last menstrual period).
· Stage 1: dilation stage (6-12 hrs)
Initiated by oxytocin, which stimulates:
uterus to contract
placenta to produce prostaglandins
Descent of fetus ruptures amniotic sac & dilates cervix to 10 centimeters.
· Stage 2: delivery of infant (~2 hrs)
Lasts from full dilation to birth.
Usually delivered in head-first orientation.
Cesarean section - surgical delivery.
· Stage 3: delivery of placenta (~30 min)
Uterine contractions expel placenta & extraembryonic membranes.
Of every 100 secondary oocytes exposed to sperm, only 31 will survive to be born.
D. Postnatal Development

키워드

생식 ,   발생,   남성 생식기,   여성 생식기,   정소,   난소,   reproduction,   development