From which germ layers do the extra-embryonic membranes form, and what are each membrane's functions?
What will be an ideal response?
The yolk sac forms from the endoderm and mesoderm; it is an important site of blood cell formation. The amnion forms from the ectoderm and mesoderm; it encloses the fluid that surrounds and cushions the developing embryo and fetus. The allantois forms from the endoderm and mesoderm; its base gives rise to the urinary bladder. The chorion forms from the mesoderm and cytotrophoblast; it surrounds the blastocoele.
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The connection of the anterior portion of the tongue to the underlying epithelium is the
A) uvula. B) faux. C) lingual frenulum. D) labial frenulum. E) glossal septum.
What is the term for removing the tip of a chick's mouth part? __________________________
Fill in the blank(s) with correct word
Transfer of mRNA from the nucleus to the cytosol occurs through
A) tRNA. B) DNA. C) endocytosis. D) exocytosis. E) nuclear pores.
The triceps surae consists of three muscles in the lower limb.
Answer the following statement true (T) or false (F)