摘要:

The ‘anatotopography of cranial thoracic inlets, the carotid body and associated structures in the caudal pole of the thyroid gland are described. The source from which the various groups of fowls (n = 65) were obtained as well as the varied localisation of the carotid body are indicated. In this investigation, the carotid body was found to be situated mostly (49 cases) either on or in the immediate vicinity of blood vessels (carotid and inferior thyroid artery) and only in 14 cases in close association with the parathyroid

ISSN:1422-6405    

DOI:10.1159/000144850

出版商:S. Karger AG    

年代:1977

数据来源: Karger

摘要:

Ganglia, rich in cholinesterase substance, were recorded at a little distance to the islets of Langerhans, connected with the fibres of the peri-insular plexus which were referred as neuro-insular complex. The peri-insular complex was made up of a large number of non-myelinated and partially by myelinated nerve fibres, and it was found in association with the post-ganglionic nerve fibres.

ISSN:1422-6405    

DOI:10.1159/000144851

出版商:S. Karger AG    

年代:1977

数据来源: Karger

摘要:

The testicular arteries of Didelphis azarae originate from the abdominal aorta either independently from each other or by way of a common trunk. Accessory testicular arteries may be found. At the spermatic cord they form a rete mirabile having 26.8 ± 5.0 and 29.3 ± 4.9 slender branches on the right and left sides, respectively. The arterial branches are intermingled with veins of similar caliber and number. Near the testis the branches of the rete reunite in a single vessel which then penetrates the parenchyma of the testis. Inside the testis the artery divides usually into two main branches that course toward the caudal pole. The rectal, scrotal and testicular temperatures were 32, 28.5 and 30.4 °C, respectively, appearing that an abdominotesticular gradient temperature exists in this animal. Whether this mechanism is thermoregulatory for the normal spermatogenesis cannot be inferred from the present wo

ISSN:1422-6405    

DOI:10.1159/000144852

出版商:S. Karger AG    

年代:1977

数据来源: Karger

摘要:

The authors give a description of the microscopic anatomy of the scrotum, testis and its excurrent duct system and the structures of the spermatic cord. The scrotal skin of Didelphis azarae is hairy with the surface marked by shallow grooves and spotted with black pigmented areas. Clear cells and mitotic figures are frequently seen in the basal region. The sweat glands are tubular, apocrine, with alcian-blue- and PAS-positive secretion, presenting large myoepithelial cells. The tunica dartos is poorly developed. The tunica vaginalis is constituted by three layers, presenting patches of melanocytes in variable extensions. The tunica albuginea is composed preponderantly of collagen and thin elastic fibers without muscle fibers. The interstitial tissue presents connective cells and a large number of Leydig cells. Mast cells were not observed. The tunica propria of the seminiferous tubuli is fibroelastic with two or three layers of elongated cells. The straight tubuli are divided into three different portions lined by epithelium with variable height. These tubuli at the mediastinum join each other to form a single duct near the cranial pole of the testis. The extratesticular segment of the efferent duct divides initially into two and then into three or four smaller liexuous ductuli to constitute the head of the epididymis. The spermatic cord shows a well-developed cremaster muscle. A collagenous fibrous band separates the muscle from the deferent duct and vessels. Mast cells are observed among the muscle fibers of the cremaster and the tunica adventitia of the blood vessels.

ISSN:1422-6405    

DOI:10.1159/000144853

出版商:S. Karger AG    

年代:1977

数据来源: Karger

摘要:

The immunofluorescent staining of the human normal testis shows that both peritubular and tubular cells bind antimyosin-like antibodies. The same cells are provided with a large amount of microfilaments within the cytoplasm. The thin microfilaments observed by electron microscopy in various cells of the human testis likely correspond to the sites of immunofluorescent staining. In pathological specimens there can be observed a decrease in peritubular smooth muscle cells associated with a decrease in cytoplasmic microfilaments and in the immunofluorescent staining of some cells.

ISSN:1422-6405    

DOI:10.1159/000144854

出版商:S. Karger AG    

年代:1977

数据来源: Karger

ISSN:1422-6405    

DOI:10.1159/000144855

出版商:S. Karger AG    

年代:1977

数据来源: Karger

ISSN:1422-6405    

DOI:10.1159/000144856

出版商:S. Karger AG    

年代:1977

数据来源: Karger