A sudden inspiration caused by a spasmodic contraction of the diaphragm while the
glottis is closed is a
A) laugh. B) sneeze. C) yawn. D) hiccup.
D
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The watery fluid component of blood is called
A) hemosol. B) liquid elements. C) formed elements. D) hemoplasm. E) plasma.
We noted that many features typical of vertebrates, such as a distinct head and limbs of some sort for locomotion, are seen in invertebrates such as insects and crustaceans, and even in cephalopods (squid and octopuses)
What characteristic do these animals share with vertebrates that might have led to the independent evolution of such structures?
A plane running vertically or longitudinally from front to back parallel to the midsagittal or median plane, dividing the body into right and left parts, is ___________________.
Fill in the blank(s) with the appropriate word(s).
The “blind spot” of the eye is also called the:
a. macula lutea b. fovea centralis c. optic disc d. choroid layer