Download Human Reproductive Systems

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts
no text concepts found
Transcript
Human Reproductive Systems
Male Reproductive System
• Testes: male gonads
– Form male gametes (sperm) in ________________________
• Scrotum: sac that holds testes outside of body cavity
– Sperm develop optimally ____________________________
____________________________________.
• Epididymus: _______________________ to mature
• Penis:
– fleshy tube with ____________
allowing to internal fertilization
• Vas Deferens:
– carries sperm ______________
____________ during ejaculation
• Semen:
– transport medium for sperm
– Made up nutrient fluid to
nourish and protect sperm in
female reproductive tract
• Urethra:
– tube where semen exits penis
– Shares same structure with
_____________________
• Vasectomy:
– _______________________,
preventing sperm from leaving
the body
• Testosterone:
– produced by _____________
– plays a role in development of
male secondary sex
characteristics
• FSH and LH:
– secreted by ______________
– help in growth and
development of sperm in testes
Female Reproductive System
• Ovaries: female gonads
– Produce eggs
– Secrete _______________
– Each contains about 200,000
tiny egg sacs called __________
– One egg is released each month
during ____________________
– Estrogen:
• causes development of female
secondary sexual characteristics
• Breast development, broadened
pelvis, distribution of body fat
• Fallopian Tubes or Oviducts:
– near each ovary but not directly
connected to it
– ____________line tube and create
current that draws the released egg
towards uterus
– Where egg is __________________
• Uterus:
– thick walled muscular organ where a
fertilized egg will implant and grow
• Cervix:
– narrow _____________________
• Vagina:
– ____________________, site where
sperm is deposited
• Note: Urinary and reproductive tracts
are separate in females
Menstrual Cycle
Series of hormonally controlled
changes that occur to the ovary and
uterine lining
• Basic Steps of Cycle:
– Egg matures and erupts from its follicle entering fallopian tube.
– Wall of the uterus has __________________ with a rich supply of blood
vessels (endometrial lining) and is prepared to receive a fertilized egg
– If egg not fertilized, lining breaks down and passes from the body as
menstrual fluid and cycle begins again
Stages of Menstrual Cycle
• Controlled by _____________________________
– Brain (FSH & LH) and ovary (estrogen & progesterone)
• Follicle Stage (10-14 days)
– _____________________ follicle
stimulating hormone (FSH)
causing follicle in ovary to mature
– ____________ gets secreted by
follicle in ovary as it develops,
causing uterine lining to thicken
• Ovulation (middle of cycle)
– Increased estrogen causes
pituitary to lower FSH and begin
secreting _______________ (LH)
– When this reaches certain level
ovulation occurs and __________
________________ releasing egg
– Egg must be fertilized in about 24
hours or it dies
• Corpus Luteum Stage (10-14 days)
– Ruptured follicle forms corpus luteum (yellow body) which
secretes ______________________
– Progesterone maintains the _________________________
• Menstruation (3-5 days)
– If fertilization doesn’t happen, LH secretion decreases,
corpus luteum breaks down and ________________drops
– Uterine lining is no longer maintained and ______________
and is released as ____________________
Menopause: the permanent
cessation of the menstrual cycle
Human Fertilization & Development
• Fertilization: (Internal)
– ejaculation of _________________________ into vagina
– sperm swim through cervix into uterus and into Fallopian tube where
fertilization takes place
– one sperm breaks through membrane surrounding egg and fuses with
egg nucleus forming ___________________
• Gestation: the period of development ____________________
In Vitro Fertilization
Egg is fertilized with sperm _______________ then
placed into uterus several days later where it can implant
Embryo
Development
• In Fallopian Tube:
– fertilization occurs
– ____________ occurs
– ________ and ________ stage
http://www.dnatube.com/video/1127/Human-Reproduction-Fertilization-and-Fetal-Development
is reached
• In Uterus
– ______________ occurs
– embryo attaches itself to the
lining of uterus
– _______________ and
__________________occur
– Forms 3 layers from which
different tissues develop
• Ectopic Pregnancy
– Sometimes the embryo implants someplace other
than uterus (in oviduct or even in the abdomen).
This often results in the death of the embryo and
or the mother.
• Fraternal Twins:
– fertilization __________________
• Identical Twins:
Multiple
Embryos
– __________________ and splits into two separate embryos
– Conjoined Twins: when identical twins don’t separate
completely
Protecting & Nourishing Embryo
• Chorion:
– forms small fingerlike projections called
_______________ that extend into uterine
lining
• Placenta:
– uterine lining and chorionic villi come
together
– villi constantly bathed in ______________
– exchange of nutrients, oxygen and wastes
takes place here
• Umbilical Cord:
– rope like structure connects developing
fetus to placenta
• Amnion:
– membrane sack surrounding fetus
– filled with ___________________
– protects fetus from shock
• Amniocentesis:
– testing amniotic fluid for chromosomal and
developmental disorders
• Labor:
– uterine muscles _________
– opening to cervix gets larger
Labor & Birth
• Eventually amniotic sac
bursts open and baby
passes through birth canal
• Shortly after the ________
or “afterbirth” is expelled
http://www.youtube.com/watch?v=BgZ5z6RB06c&safe=active
• Nova: The Miracle of Life
• http://www.youtube.com/watch?v=Wou1Udu_vr8
&safe=active
• Nova: Life’s Greatest Miracle
• http://www.youtube.com/watch?v=swYuEkzTkV0
&safe=active
• Excellent for extra credit!!
• And both are related to your test!!