ISSN:0001-7272    

DOI:10.1111/j.1463-6395.1969.tb00536.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

摘要:

Abstract1). The hematocrit ofChimaera monstrosais very low. Among the blood cells a large proportion are leukocytes.2). The majority of the leukocytes may be regarded as lymphocytes or lymphocyte‐like cells. Granulocytes constitute only a minor portion of the leukocytes of the blood but are abundant in the connective tissue.3). From morphological grounds it is probable that lymphocytopoiesis takes place in the spleen, the cranial lymphomyeloid tissue, the thymus and possibly also in other less well defined lymphomyeloid structures.4). An intense production of eosinophilic granulocytes occurs in the cranial lymphomyeloid tissue.5). The plasma contains globulins but no albumin. Two or three fractions resembling immunoglobulins of higher vertebrates migrate towards the cathode. Age differences were observed.6). The hypothesis is advanced that globulins originate from lymphocytes or lymphocyte‐like cells of the blood and from blast cells of various lympho

ISSN:0001-7272    

DOI:10.1111/j.1463-6395.1969.tb00537.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

摘要:

AbstractA 4.5 cmMyxineembryo is described. The structure of its adenohypophysis suggests that it is derived from a dorsal thickening and proliferation of the nasopharyngcal duct epithelium as a homogeneous mass of cells. This process seems to start medially and proceed laterally. The characteristic lobulated appearance of the adult adenohypophysis is caused by a later invasion of connective tissue. Large areas of the ventral brain surface were found to be richly vascularized. No traces of an endostylar arrangement were observed and the thyroid follicles were distinct.

ISSN:0001-7272    

DOI:10.1111/j.1463-6395.1969.tb00538.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

摘要:

AbstractThe retinal cells of the hagfish,Myxine glutinosa, possess at the ultra‐structural level features which occur in the eyes of higher vertebrates. The “receptor” cells contain outer segment, ciliary structure and synaptic region. Other structures in the diminutive eye strongly suggest a functional

ISSN:0001-7272    

DOI:10.1111/j.1463-6395.1969.tb00539.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY