Ch. 29 pt 1
Last Modified: 2011-12-15
Related Textbooks:Seeley's Principles of Anatomy and Physiology
Germinal Period-first 2 weeks
embryonic period-germlayers-2nd to 8th week
Fetal period-organ systems-last 30 weeks.
developing human from 8 weeks to birth
1 month to 1-2 years
child can walk
1-2 years to puberty
emotional characteristics form at this age.
puberty to 20 years
Male 12-14 growth 19-20 in
Femal 11-13 growth 17-18 in
20 til death
Sperm binds to zona pellucida
enzymes are released near the oocyte
hundred of acrosomes release enzymes to digest zona pellucida
male and female pronuclei
12 or more cells
4-5 days~32 cells
burrowing of the blastocyst into unterine wall
6 to 7 days
maternal component of the placenta
place of gas exchange, nutrients and waste products
helps form placenta (embryonic component)
Encloses embryonic body and all other membranes
Layer of cells forming boundary of amniotic cavity
Eventually surrounds embryo
Protection and environment
13~14 after fert. embryonic disk becomes a slightly elongated, oval structure
Provides a buoyant environment
Helps maintain a constant homeostatic temp
Comes from maternal blood and later fetal urine. :(
Hyoblast cells form a sac on the ventral surface of embryo
forms part of digestive tube
produces earliest blood cells and vessels.
Source of primordial germ cells
Small outpocket at the caudal end of the yolk sac
Structural base for the umbilical cord
Becomes part of the urinary bladder
Forms from ectoderm 18 days past fertilization
lateral edges/neural folds begin to rise and meet in midline...neural tubules
When sides of neural tube come together
Give rise to pns, adrenal, medualla, melanocytes
Fore and hind gut
Solid bars of tissue form along lateral surface of head
Central pouch is pharynx
Forms the Mamillary body cavity
later develops into the pericardial, pleural and peritoneal cavities
Major organ systems begin to develop during the period between 14 and 60 days past fert.
Mesoderm and neural crest (dermis)
myoblasts (skeletal muscle fibers)
Words From Our Students
"StudyBlue is great for studying. I love the study guides, flashcards, and quizzes. So extremely helpful for all of my classes!"
Alice, Arizona State University
"I'm a student using StudyBlue, and I can 100% say that it helps me so much. Study materials for almost every subject in school are available in StudyBlue. It is so helpful for my education!"
Tim, University of Florida
"StudyBlue provides way more features than other studying apps, and thus allows me to learn very quickly! I actually feel much more comfortable taking my exams after I study with this app. It's amazing!"
Jennifer, Rutgers University
"I love flashcards but carrying around physical flashcards is cumbersome and simply outdated. StudyBlue is exactly what I was looking for!"