Term
| How long is the prenatal development? |
|
Definition
|
|
Term
| ______ is the study of prenatal development. |
|
Definition
|
|
Term
| Prenatal development consists of 3 distinct periods. What are those 3 distinct periods in order? |
|
Definition
1. preimplantation
2. embryonic
3. fetal |
|
|
Term
| What prenatal developmental periods make up the 1st trimester? |
|
Definition
|
|
Term
| What prenatal developmental period make up the last 2 trimesters? |
|
Definition
|
|
Term
| What is the preimplantation period and when does it occur? |
|
Definition
A.) fertilization and implantation
B.) 1st week |
|
|
Term
| When does the embryonic period occur? |
|
Definition
|
|
Term
| When does the fetal period occur? |
|
Definition
|
|
Term
| Describe the preimplantation period. |
|
Definition
SPERM fertilizes the OVUM which form a ZYGOTE
ZYGOTE will undergo MITOSIS and become a MORULA
MORULA will continue to divide secreting fluid and becoming a vesicle called BLASTOCYST |
|
|
Term
| What is the process of reproductive cell production that ensures the correct number of chromosomes for the future embryo? |
|
Definition
|
|
Term
| _________ is the portion of cell division that occurs in phases and results in 2 daughter cells that are identical to the parent cell. |
|
Definition
|
|
Term
| When does meiosis occur during prenatal development? |
|
Definition
|
|
Term
| When does mitosis occur during prenatal development? |
|
Definition
|
|
Term
| After the 1st week the blastocyst stops traveling. Why does the blastocyst stop traveling? |
|
Definition
| blastocyst reaches the UTERUS and becomes imbedded in the endometrium |
|
|
Term
|
Definition
| innermost lining of the uterus |
|
|
Term
| After 7 days of cell division the blastocyst consists of 2 definite layers of peripheral cells. What are those layers? |
|
Definition
1. trophoblast
2. embryoblast |
|
|
Term
| What is the purpose of the trophoblast layer? |
|
Definition
| prenatal support (nourishes the embryo) |
|
|
Term
| What is the purpose of the embryoblast layer? |
|
Definition
| becomes the embryo (baby) during the next prenatal period |
|
|
