71.   Take the human heart.

72.   The boundaries of public domain still stretch to the human heart.

73.   The everyday work of the human heart is extraordinarily difficult to duplicate.

74.   The feat puts scientists closer to being able to grow a human heart.

75.   The feces contains a protein, myoglobin, whose structure is unique to human heart and muscle tissue.

76.   The elder Milic rocked silently, oblivious, his head bobbing up and down with the even beat of a human heart.

77.   The he human heart always strives to survive.

78.   The impressions look a little like human hearts.

79.   The multisegment building has been compared to pieces of a broken guitar, a human heart and parts of the human inner ear.

80.   The size of the human heart is apparent in other ways, even as fighting continues in that ravaged country.