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Biomedical subjects

H RITTER

Publications and source records attributed to H RITTER.

At least 19 recordsLinked to original sources
PubMed1965

BLOOD OF A COCKROACH: UNUSUAL CELLULAR BEHAVIOR.

In blood smears of a cockroach a small cell occurs which is frequently paired with a larger anucleate cytoplasmic body. The larger body in such pairs is free of nucleic acid, but contains polysaccharides, as demonstrated by the periodic acid-Schiff reaction. At one extreme of a series of these associations, the cell is completely distinct from the cytoplasmic body. At the other extreme the nucleus of the cell is within and apparently a part of the larger body. A graded series of pairs suggests a mechanism resembling phagocytosis in which the cytoplasmic body either gains or regains cell status by retaining the nucleus of the ingested member.

Animals↗
PubMed1964

DEFENSE OF MATE AND MATING CHAMBER IN A WOOD ROACH.

Studies of the eastern wood roach, Cryptocercus punctulatus, reveal that, under laboratory conditions, the mating chambers in rotten wood are inhabited by mated pairs, the male of which will usually defend the chamber successfully against intruding males by a form of fighting. In every staged contest in which the intruder won the fight, it also won the resident female. Females, as well as unmated males singly inhabiting a chamber, could not be induced to defend against an intruder of either sex.

Aggression↗