Fertilization and Intro to development

Question 1

Embryonic Period
-what do cells do
-what forms (2)

Answer 1

-divide
-tissues and organs form along with structures to support the embryo

Question 2

Fetal period
-what happens during this time

Answer 2

-the body grows and organs begin to function into systems

Question 3

Fertalization (also known as what)
-occurs when what happens
-equation for chromosomes
-sperm are _____ to the ovum
-what does the one sperm do that reaches first

Answer 3

-when a sperm and egg unite in the Fallopian tube to form a single celled zygote
-n=23+n=23 to make 2n=26
-chemically attracted
-the sperm fertalizes 4-6 hours after fertalization and prevents others from entering bc of chemical change

Question 4

After zygote forms
-what process happens (name and what it is)
-16 celled structure: what is it and how does it form
-what does it transform into, and what 2 regions does it have

Answer 4

-clevage: cellular division without enlargement of cells
-morula absorbs fluid from uterine lining
-transforms into a blastocyst with
1. trophoblast (forms into chorion)
2. inner cell mass (transoforms into embryo)