THE PHILIPPINE WATER BUFFALO

under scanning electron microscope could be used for the
identification of reliable and time conserving procedure.
Keywords: surface morphology, hair, cattle, Philippine
carabao scanning electron microscope
*The Philippine Journal of Veterinary and Animal Sciences,
13(1): 38-40, 1987.
A-34
THE CORONARY VESSELS OF THE PHILIPPINE
WATER BUFFALO (Bubalus bubalis)*
C. P. Maala, Associate Professor, College of Veterinary Medicine, University
of the Philippines Los Baños
R. D. L. Refuerzo Student
The coronary arteries and veins of the carabao were examined
in 10 latex injected specimens. The left coronary artery was
larger than the right coronary artery. It bifurcated into the
circumflex branch and the paraconal interventricular branch.
The circumflex branch occupied the left coronary groove while
the paraconal interventricular branch descended into the
paraconal interventricular groove. It gave off several septal
branches to the left side of the interventricular septum. A septal
branch may be given off by the left coronary before dividing
into the circumflex and paraconal interventricular branches.
The right coronary artery lacked a circumflex branch. It was
continued as the subsinuosal interventricular branch in the
subsinuosal interventricular septum. The arterial arteries were
fewer in number and smaller in size than the ventricular arteries.
The coronary sinus was large and divided into the azygos
vein and the great cardiac vein. In addition to the great cardiac
vein, the middle cardiac vein which was found in the
subsinuosal interventricular groove, opened directly into the
right atrium. The great cardiac vein supplied branches to the
left and right ventricular walls. Those of the left ventricle were
larger and more numerous than those of the right ventricle. The
azygos vein was as large as the great cardiac vein.
Keywords: coronary vessels, Philippine water buffalo,
Bubalus bubalis
*The Philippine Journal of Veterinary and Animal Sciences,
14(1): 20-31, 1988.
A-35
HISTOLOGICAL AND SOME HISTOCHEMICAL
FEATURES OF THE PAROTID, MANDIBULAR AND
SUBLINGUAL SALIVARY GLANDS OF THE
PHILIPPINE CARABAO*
C. P. Maala, Associate Professor, College of Veterinary
Medicine, University of the Philippines Los Baños
H. R. Casubha, Student
14
ABSTRACT OF RESEARCHES ON
THE PHILIPPINE WATER BUFFALO
The microscopic and some histochemical features of the
parotid, mandibular and sublingual salivary glands of adult
carabaos were described. Microscopically, the parotid gland
was purely serous while the mandibular and sublingual
glands were mixed glands with predominant mucous
component. The capsule of the parotid gland was well
developed and rich in collagen fibers. It was poorly
developed in sublingual gland. The interstitial tissue of parotid
gland contains a large amount of fat cells. The connective
tissue septum was most developed in sublingual gland
and least developed in mandibular gland. The parotid
excretory ducts showed a considerable number of goblet
cells. The latter were absent in the excretory ducts of both
groups and showed basal striations. There was a thick
layer of smooth muscle fibers in between lobules in the
parotid gland. Histochemically, the mucous acini of
mandibular glands contained acidic, weakly sulfated and
non-sulfated and mixed mucins. The goblet cells in the
excretory ducts of the parotid gland were positive to acidic
sulfated mucins.
Keywords: histology, histochemical, parotid gland,
mandibular gland, sublingual gland, Philippine carabao
*The Philippine Journal of Veterinary and Animal Sciences,
15(1&2): 41-59, 1989.
A-36
ELECTRON MICROSCOPIC STUDY ON THE
PANCREATIC ACINUS AND ISLETS OF THE
PHILIPPINE WATER BUFFALO (Bubalus bubalis) *
C. P. Maala, Professor, College of Veterinary Medicine, University of the
Philippines Los Baños
M. T. S. Oñate, Assistant Professor, College of Veterinary Medicine,
University of the Philippines Los Baños
E. C. Bernardo, Student, College of Veterinary Medicine, University of
the Philippines Los Baños
The pancreatic acini of the Philippine water buffalo were of
variable size and shape. In both sexes, each acinus was
composed of 5-10 pyramidal-shaped secretory cells,
centroacinar cells, and occasionally 1-2 “clear cells”. A
characteristic feature of the secretory acinar cells was the
presence of numerous supranuclearly located zymogen
granules, which appeared larger and more numerous in
the male than in female animals. In male animals there
were about 173-287 granules measuring 0.7µm-11µm while
in female animals there were approximately 50-80 granules
measuring 0.6µm-1µm. One or two centroacinar cells
were identified in the lumen of each acinus. Their pale
staining cytoplasm contained oval to round nucleus.
Because of the low magnification used, cytoplasmic
granules were hardly identified in these cells. “Clear