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Zygote to Baby


Fertilization. The combining of an egg and sperm cell to produce a zygote.
Early cell divisions are known as _________________. Cleavage.
True or False: During cleavage, the fertilized egg stays the same size and no growth occurs. True.
An early stage of animal development in which the embryo consists of a solid ball of cells formed by cleavage of the fertilized egg. Morula.
The ________ and __________ cell stage is known as the morula. 16, 32.
A complex series of changes that occurs after fertilization and eventually give rise to an adult organism. Development.
The stage of development in which the embryo consists of a single layer of cells surrounding a fluid filled cavity. Blastula.
Blastulation. The process of changing from a zygote to a blastula.
The fluid filled cavity in a blastula. Blastocoel.
Gastrulation. The process in which the cells on one side of a blastulla push into the form the two layered gasturla.
Gastrulation starts with the folding in of cells at a spot called the __________. Blastopore.
During gastrulation, the cells migrate inward, or ______________. Invaginate.
What does the ectoderm form? Hair, nails, skin, nervous system, respiratory tract, liver, pancreas.
What does the endoderm form? Digestive system.
What does the mesoderm form? Muscles, skeleton, circulatory system.
The series of changes that transforms unspecialized cells into specialized tissues and organs. Differentiation.
Embryo. Organism in the early stages of development.
When can you label an embryo as a fetus? When you can tell what type of organism it is.
Development that takes place outside of the body of the female. External development.
Stored food in an animal egg, nutrition for the growing embryo. Yolk.
Provides protection for the embryo, porous. Shell.
Lines the shell and encloses the embryo. Chorion.
Functions in the exchange of respiratory gases and excretion of wastes, uric acid. Allantois.
Contains amniotic fluid, provides a watery environment for protection. Amnion.
Surrounds the yolk and allows absorption of food into embryo blood vessels. Yolk sac.
Female organ where the embryo develops. Uterus.
A mass of blood vessels attached to the stomach of an embryo and the placenta of the mother where materials are carried between the two . Umbilical cord.
Specialized organ where the embryo receives food and oxygen from the mother's body and gets rid of wastes, such as carbon dioxide. Placenta.
How are materials exchanged between the mother and the baby? Diffusion and active transport.
Where fertilization takes place. Fallopian Tube/Oviduct.
Created by: emarciante9