It's the ninth inning, and the bases are loaded. As the pitcher winds up to throw the ball, how does each tissue in his arm contribute to this critical pitch? The ________ of his fingers grips the ball. His ________ sends instructions that trigger his ________ to contract. His ________ provides stability and transmits the force produced.
A. epithelium; ectoderm; mesoderm; endoderm
B. ectoderm; ectoderm; mesoderm; endoderm
C. connective tissue; nerve tissue; muscle tissue; epithelial tissue
D. epithelial tissue; nerve tissue; muscle tissue; connective tissue
Answer: D
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