The allantois
A. is the fetal half of the placenta.
B. becomes the umbilical cord vessels.
C. cushions and protects the embryo with fluid.
D. is the first site of blood cell formation.
Answer: B
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Which letter is associated with the line that is a thin protein structure that serves as an attachment site for thin filament ends?
A. I B. A C. Z D. M E. H
Describe the main function of the respiratory system
What will be an ideal response?
The exceptional flexibility of the shoulder girdle is due, in part, to the ________
A) strong ligament that holds the head of the humerus to its socket B) deep socket that holds the humerus C) strong joint that holds the shoulder girdle to the axial skeleton D) ability of the scapula to slide easily against the thorax
The inferior nasal conchae
A) attach muscles that move the eye. B) contain the nerves for olfaction. C) create turbulence in the nasal passageways. D) protect the pituitary gland. E) attach muscles that move the eyelids.