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ANATOMY OF LUNGS
ANATOMY OF LUNGS

... and extends vertically downwards to form Lingula. This is called cardiac notch(percussion in this area gives a dull note as compared to dull note obtained over ...
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Lophophorata SP
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... Lophophorates inhabit a secreted enclosure, tube, shell, or zooecium, that may be organic or mineral. The body is divided into two parts, the mesosome and metasome, each with a coelomic space. The small mesosome is the region of the lophophore and the much larger metasome is the trunk and accounts f ...
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... the image above. The main difference is that the ratio of gray matter to white matter varies among segments of the spinal cord. At the lower levels of the spinal cord there is a greater ratio of grey matter to white matter. This should make sense, as there are less ascending and descending tracts o ...
Frog Dissection - Carbonado Historical School District
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... • Pry the Mouth open. Cut Jaws at joints. Examine inside of mouth. • Eustachian Tubes are near the corners of the mouth . Insert probe into opening and pushobserve where it comes out. • Two large Muscular Pads are in the roof of the mouth(eyes retract here when it blinks) • Locate Tongue.What unusua ...
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... The physical world has three dimensions: height, width, and depth. A plane is a two-dimensional slice through the three-dimensional world. There are an infinite number of planes, and orientations of planes. In anatomy, there are names for a few of the infinite number of planes. The three cardinal bo ...
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Arthropod head problem



The arthropod head problem is a long-standing zoological dispute concerning the segmental composition of the heads of the various arthropod groups, and how they are evolutionarily related to each other. While the dispute has historically centered on the exact make-up of the insect head, it has been widened to include other living arthropods such as the crustaceans and chelicerates; and fossil forms, such as the many arthropods known from exceptionally preserved Cambrian faunas. While the topic has classically been based on insect embryology, in recent years a great deal of developmental molecular data has become available. Dozens of more or less distinct solutions to the problem, dating back to at least 1897, have been published, including several in the 2000s.The arthropod head problem is popularly known as the ""endless dispute"", the title of a famous paper on the subject by Jacob G. Rempel in 1975, referring to its seemingly intractable nature. Although some progress has been made since that time, the precise nature of especially the labrum and the pre-oral region of arthropods remain highly controversial.
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