Friday, April 10, 2009

Chapter 46 Vocab!

Here is Chapter 46 Vocab. Chapter 47 is also due next week but have a good long weekend everyone!

Organogenesis The process in which organ rudiments develop from the three germ layers after gastrulation.

Blastocyst The blastula stage of mammalian embryonic development, consisting of an inner cell mass, a cavity, and an outer layer, the trophoblast. In humans, the blastocyst forms one week after fertilization.

Cleavage (1) The process of cytokinesis in animal cells, characterized by pinching of the plasma membrane. (2) The succession of rapid cell divisions without significant growth during early embryonic development that converts the zygote to a ball of cells.
Estrus The period of time which a female mammal is receptive to breeding.

acrosome A compartment in the head of the sperm that contains enzymes that allow the sperm to penetrate the protective layers of an egg.

spermatogenesis The continuous and prolific production of mature sperm cells in the testis.

gonad The male and female sex organs; the gamete-producing organs in most animals.
parthenogenesis Asexual reproduction in which females produce offspring from unfertilized eggs.

Zygote The diploid product of the union of haploid gametes during fertilization; a fertilized egg.

gamete A haploid reproductive cell, such as an egg or sperm. Gametes unite during sexual reproduction to produce a diploid zygote.

asexual reproduction The generation of offspring from a single parent that occurs without the fusion of gametes (by budding, division of a single cell, or division of the entire organism into two or more parts). In most cases, the offspring are genetically identical to the parent.

bacul- a rod
blasto- produce
coit- a coming together
-ectomy= cut out
gyno- female
labi- lip
menstru- month
lact- milk
Oo- egg
partheno- a virgin
-theca= a cup, case
partur- giving birth

Multiple Choice
1. Which is not a part of the sperm anatomy?
a) acrosome
c) trophoblast
2. What is implanted in the endometrium?
3. What is not a type of asexual reproduction?
b)sexual reproduction
4. T/F Oocytes is another word for eggs
5. T/F Menstrual cycles last on average 10 days.
1. C 2. A 3. B
4. T 5. F

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