Anatomy & Physiology: The Unity of Form and Function: Chapter 29 Human Development and Aging Flashcards

Once all organs system are present during gestation, the conceptus is then called a ________

Name the transport process by which oxygen, carbon dioxide, and nutrients cross the placenta

List the names of the three primary germ layers

Define implantation

A single-celled, fertilized egg is known as a _____

The ______ is a disc shaped organ embedded in the uterine wall. It provides nutrition to the fetus via the umbilical cord

The period from fertilization through the 12th week is known as the _____

Placental nutrition reaches the developing conceptus via a tube of blood vessels called the _____ _____

The _____ and the ______ are two features of the fetal circulation that allow blood to bypass the non-functional lungs

Name the outermost germ layer

Name the stages of developing organism that occur during the preembryonic stage

All of the body's tissues originate from the tissues called ______

List some structures that arise from the endoderm

List the functions of amniotic fluid

The ______ performs respiratory, excretory, nutritional, endocrine, and immune functions of the fetus

At the placenta, maternal blood is found within structures called _____ and fetal blood is found within

The stage of _____ is complete when the blastomeres form three primary germ layers

List some structures that arise from the ectoderm

The ____ ______ arises from cells of the hypoblast. It contributes to the formation of the digestive tract and is the site of production of the first blood cells

The _____ is the germ layer that will form the inner layer of the digestive tract

Indicate some of the structures that arise from the mesoderm

In the developing fetus, blood from the umbilical vein bypasses the liver and empties directly into the vena cava by way of a vessel called the ductus ______

Fertilization occurs in the ______ of the female reproductive tract

The chorionic ______ are shaggy outgrowths of the chorion; they are involved in functioning of the placenta

Daughter cells formed by cell division following fertilization are called _____

Name the sac that encloses both the embryo and a fluid-filled space

Indicate circulatory changes that occur just after birth

The normal gestation period for a single (non-twin) baby is _____ weeks

The ____ are the organelles that contain genetic information, one from the sperm and one from the egg. These are present following fertilization but before mixing of sperm and egg chromosomes.

Approximately 6 days after ejaculation, sperm are

Indicate the three major processes that occur during the preembryonic stage of gestation

Describe a morula

Summarize the events of the second trimester

The process of _____ is the differentiation of the primary germ layers into organ and organ systems

The ____ is the outermost embryonic membrane that encloses all of the other membranes and the embryo

Name the term for cell division that occurs in the earliest stages of zygote development

Name the narrow space between embryoblast (inner cell mass) and the trophoblast during early embryogenesis

The _____ stage begins 16 days post conception, after the three germ layers have developed