Ch. 40

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All animals, whether large or small, have _____.

most of their cells in contact with an aqueous medium

Interstitial fluid is _____.

a common site of exchange between blood and body cells

Much of the coordination of vertebrate body functions via chemical signals is accomplished by the _____.

endocrine system

Most of the exchange surfaces of multicellular animals are lined with _____.

epithelial tissue

All types of muscle tissue have _____.

interactions between actin and myosin

Blood is best classified as connective tissue because _____.

its cells are separated from each other by an extracellular matrix

The four major categories of tissues are _____.

nervous, epithelial, connective, and muscle

Connective tissues typically have _____.

relatively few cells and a large amount of extracellular matrix

Of the following choices, the epithelium with the shortest diffusion distance is _____.

simple squamous epithelium

Food moves along the digestive tract as the result of contractions by _____.

smooth muscle

The type of muscle tissue surrounding the intestines and blood vessels is _____.

smooth muscle


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