Question

Acidic Acrosomal reaction Amnion Chemical Chorionic villi Cilia and peristalsis Cleavage Endometrial mucosa Fertilization Fuses Human chorionic gonadotropin (hCG) Inner cell mass Meiosis II Morula One One-third Progesterone and estrogens Secondary oocyte Specialization Surface receptors Thousand Trophoblast Two Umbilical cord 1-2 12-24 24-48 24 270 365 16. The zygote is propelled through the uterine tube by . 17. As the zygote journeys through the uterine tube it undergoes rapid mitotic division to form 2 cells, then 4 cells and so on. This early stage of embryonic development is known as the stage. 18. On or about three days after fertilization (or day 17 of the females menstrual cycle), the embryo is a ball of 16 cells called a . 19. The developing embryo will float freely in the uterine cavity until about day seven and it continues to divide until it is composed of 100 cells with a hollow cavity that is formed from_cells. 20. Between days 4 and 7 of development, the growing embryo begins to produce the hormone __ which directs the corpus luteum to continue to produce hormone needed to sustain pregnancy. 21. The seventh day after fertilization, the blastocyst has embedded itself in the _ 22. After implantation, the three primary germ layers begin to develop from the . 23. After implantation, the trophoblast develops _, projections that fuse with the mother’s uterine tissues and eventually form the placenta. 24. Once the placenta has formed, the embryo is surrounded by a fluid-filled sack called the __ . 25. By the third week of gestation, the_ is functioning to deliver oxygen and nutrients and remove wastes from the embryonic blood. 26. By the eighth week of pregnancy, the placenta is producing that maintain the pregnancy as the corpus luteum degenerates. 27. By the eighth week of pregnancy, all organ systems have begun to form. As of the ninth week of pregnancy, the fetus undergoes growth and organ as well as changes in body proportions. 28. During the fetal period, the fetus grows from approximately 1 gram (0.03 ounces) to 4.1 kg (6 -10 pounds)._ days after fertilization, the fetus is considered full term.

          Acidic
Acrosomal reaction 
Amnion
Chemical
Chorionic villi
Cilia and peristalsis 
Cleavage 
Endometrial mucosa
Fertilization
Fuses 
Human chorionic gonadotropin (hCG)
Inner cell mass
Meiosis II
Morula
One
One-third
Progesterone and estrogens
Secondary oocyte
Specialization
Surface receptors
Thousand
Trophoblast
Two
Umbilical cord
1-2
12-24
24-48
24
270
365
16. The zygote is propelled through the uterine tube by ________
        . 
17. As the zygote journeys through the uterine tube it
undergoes rapid mitotic division to form 2 cells, then 4 cells and
so on. This early stage of embryonic development is known as the
______  stage.
18. On or about three days after fertilization (or day 17
of the females menstrual cycle), the embryo is a ball of 16 cells
called a ________              
                 
    .
19. The developing embryo will float freely in the uterine
cavity until about day seven and it continues to divide until it is
composed of 100 cells with a hollow cavity that is formed
from_____cells.
20. Between days 4 and 7 of development, the growing embryo
begins to produce the hormone ______        
                 
           which directs the corpus
luteum to continue to produce hormone needed to sustain
pregnancy.
21. The seventh day after fertilization, the blastocyst has
embedded itself in the _____    
22. After implantation, the three primary germ layers begin to
develop from the______      . 
23. After implantation, the trophoblast develops
 _______, projections that fuse with the mother’s uterine
tissues and eventually form the placenta.
24. Once the placenta has formed, the embryo is surrounded
by a fluid-filled sack called the ______       
                 
   .
25. By the third week of gestation, the_____  is
functioning to deliver oxygen and nutrients and remove wastes from
the embryonic blood.
26. By the eighth week of pregnancy, the placenta is
producing____              
                 
                 
                 
                 
  that maintain the pregnancy as the corpus luteum
degenerates.
27. By the eighth week of pregnancy, all organ systems have
begun to form. As of the ninth week of pregnancy, the fetus
undergoes growth and organ ______as well as changes in body
proportions.
28. During the fetal period, the fetus grows from
approximately 1 gram (0.03 ounces) to 4.1 kg (6 -10 pounds)._____
                 
                 
  days after fertilization, the fetus is considered full
term.

Added by Michael L.

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