Flashcards in Ch 17 Practice Deck (32)
What is the purpose of an episiotomy?
To enlarge the vaginal orifice during child birth
The structure that connects the embryo to the placenta is called the ______ ______.
What developments occur during the first 5 years of childhood development?
• Development of gross fine motor skills
• Maturation of senses
• Development of speech
Egg is fertilized by sperm; zygote begins to divide
Weeks 2-8; Implantation occurs; nervous system, limb buds, and all other systems are developing
Third - ninth month; organ systems complete development
During animal development the three embryonic ______ layers develop into the different organs and tissues.
List the events of fertilization:
1. Sperm penetrate the corona radiata
2. Sperm release acrosomal enzymes
3. Sperm binds to oocyte plasma membrane
4. Sperm pronucleus forms
5. Sperm and egg pronuclei enclosed in nuclear envelope
The study of aging is called ______.
______ is the embedding of the embryo within the lining of the uterus.
Fertilization occurs when sperm and the egg unite to form the first cell of a new individual, called the ______.
BY the tenth week of embryonic development, the chorion has developed into the ______, which is now secreting hormones that help maintain the pregnancy.
The ______ provides the developing embryo/fetus with nourishment and oxygen and takes away its waste.
Sperm require lots of energy and this is generated from the mitochondria located within the ______.
Identify the three layers of tissue formed during gastrulation:
• Endoderm (inner layer)
• Mesoderm (middle layer)
• Ectoderm (outer layer)
The events of the first week after fertilization encompass ______.
The presence of hormones produced by the ______ ______ after implantation prevent menstruation.
By the tenth week of embryonic development, the chorion has developed into the ______, which is now secreting hormones that help maintain the pregnancy.
During the ______ process of development cells take on a specific structure and function.
The gene on the Y chromosome that induces development of male genetalia is called the ______ gene.
During embryonic development, cell division is accompanied by an increase in size of the daughter cells
The shaping of the embryo that is evident when certain cells migrate in relation to other cells
When cells take on specific structure and function
The first cell divisions that occur immediately after fertilization
Membranous areas in the skull that permit flexibility for passing through the birth canal and rapid growth of the brain during infancy are called ______.
The middle germ layer of an animal embryo that gives rise to muscle, several internal organs, and connective tissue layers is the:
During which stage of the birthing process does the cervix dilate?
Child birth is regulated by a ______ feedback mechanism.
A pregnancy in which the embryo implants in a location other than the uterus is called a(n) ______ pregnancy.