1. A medical image processing apparatus comprising: an image extracting section that extracts a frame image from in vivo motion picture data picked up by an in vivo image pickup device or a plurality of consecutively picked-up still image data; and an image analysis section that analyzes the frame image extracted by the image extracting section to output an image analysis result, the image analysis section comprising: a first biological feature detection section that detects a first biological feature; a second biological feature detection section that detects, on the basis of a detection result obtained by the first biological feature detection section, a second biological feature in a frame image picked up temporally before or after the image used for detection by the first biological feature detection section; and a condition determination section that makes a determination for a biological condition on the basis of a detection result obtained by the second biological feature detection section to output the determination, wherein on the basis of the detection result obtained by the first biological feature detection section, the second biological feature detection section acquires a predetermined number of frame images to execute a process of detecting the second biological feature on the frame image.