Question | Answer |
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. |
LABEL THE EMBRYO | :D |
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. |