Anth 369 Lab

Front 1

Fertilization

Back 1

fallopian tubes
egg or sperm can arrive first
sperm can survive up to 4 days there.
egg must be fertilized within 12-24 hours of when its there.

Front 2

Capacitation

Back 2

conditioning of hte sperm, sperm cap

200 sperm reach fertilization site, only 1 egg

once the winner sperm gets there it causes a chem rxn that prevents other sperm from penetrating, sperm loses tail and head swells and nucleii from sperm and egg combine (2 haploid cells come together and fusing to make diploid cell)

Front 3

Conceptus (Stage of Development)

Back 3

"Zygote-> Morula -> Blastocyst"
weeks 0-2, "Zygote" and its membranes
Embryogenesis-> Formation of Embryo

Front 4

Embryonic Stage

Back 4

weeks 3-8
formation of basic body plan
development of major organs, not all functioning but all structurally

Front 5

Fetal Stage

Back 5

weeks 9-38 (majority of gestation)
resembles human with real arms and legs, heart that beats
functioning human and then focusses on growing

Front 6

First Cell Devision

Back 6

first divides the next day and for 2-3 days and travels to Uterus

Front 7

Morula

Back 7

3-4 days at least 12 cells/blastomeres

Front 8

Implantation

Back 8

days 5-7
Hatching, blastocyst sheds its capsul (Zone Pellucida)

STARTS getting nutrition from mother as well as yoke sac

2 day window for humans where this must occur

Front 9

Gastrulation

Back 9

days 7-10
All cells with same DNA start coding and expressing different functions:
3 germ layers: Ectoderm(Skin nervous system), Endoderm(internal organs), Mesoderm (muslces bones and heart)

Front 10

Pregnancy Established

Back 10

days 10-14
Embryo forms, emniotic cavity begins to form, Chorion (Placenta) starts to form

Front 11

Ectoderm

Back 11

becomes skin & Nervous system

Front 12

Endoderm

Back 12

Becomes internal organs

Front 13

Mesoderm

Back 13

becomes muscles, bones and heart

Front 14

Neural Groove

Back 14

becomes neural tube and then spinal chord and brain

Front 15

Somites

Back 15

future muscles and bones

Front 16

Pharyngeal Arches

Back 16

future face, nose, features, etc.

Front 17

Organogenesis

Back 17

weeks 4-8
all major organs formed, teratogens

first detectable brain waves,

Front 18

Week 6

Back 18

sexual differentiation in response to hormonal changes

Front 19

Weeks 9-40 Fetal Period

Back 19

development complete, arms and legs, Growth Hyperplasia (cell #) and Hypertrophy (cell size)

Front 20

IUGR

Back 20

Intrauterine Growth Retardation