scholarly journals Comparative Studies of Structure and Function in Mammalian Placentas with Special Reference to Maternal-Fetal Transfer of Iron

1992 ◽  
Vol 32 (2) ◽  
pp. 331-342 ◽  
Author(s):  
BARRY F. KING
Keyword(s):  
Special Reference ◽  
Comparative Studies ◽  
Structure And Function ◽  
And Function

The Alimentary Canal of Calliphora erythrocephala L., with Special Reference to its Musculature and to the Proventriculus, Rectal Valve and Rectal Papillae

Parasitology ◽  
1934 ◽  
Vol 26 (2) ◽  
pp. 176-248 ◽  
Author(s):  
G. S. Graham-Smith
Keyword(s):  
Special Reference ◽  
Body Fluid ◽  
Alimentary Canal ◽  
Liver Cells ◽  
Structure And Function ◽  
The Body ◽  
Calliphora Erythrocephala ◽  
And Function

A detailed description of the musculature in the different regions of the alimentary canal of Calliphora erythrocephala is given, and an account of the structure and function of the crop, proventriculus, ducts of the Malpighian tubes, rectal valve and rectal papillae. It has been shown by dissections and experiments that a system of channels exists in the rectal papillae through which the body fluid probably circulates, and it is suggested that the very large cells may have functions resembling those of liver cells.

Structure and Function of β2-Glycoprotein I: With Special Reference to the Interaction with Phospholipid

Lupus ◽  
1995 ◽  
Vol 4 (1_suppl) ◽  
pp. S3-S5 ◽  
Author(s):  
Yoshihisa Hagihara ◽  
Yuji Goto ◽  
Hisao Kato ◽  
Tetsuro Yoshimura
Keyword(s):  
Special Reference ◽  
Structure And Function ◽  
Glycoprotein I ◽  
And Function

Comparative structure and function of marsupial spermatozoa

1994 ◽  
Vol 6 (4) ◽  
pp. 421 ◽  
Author(s):  
PD Temple-Smith
Keyword(s):  
Sperm Motility ◽  
Comparative Studies ◽  
Current Knowledge ◽  
Structure And Function ◽  
Basic Organization ◽  
Nuclear Shaping ◽  
Comparative Structure ◽  
Nuclear Rotation ◽  
And Function ◽  
Posterior Ring

Marsupial sperm structure has been the focus of many comparative studies in the last 30 years. Although the basic organization of the marsupial spermatozoon is similar to that of eutherian mammals, spermatozoa from this branch of therian evolution have developed a specific suite of characters which clearly distinguish them from the Eutheria. This review surveys these specializations and examines current knowledge on their respective functions and the forces which shaped their evolution. Nuclear shaping and stability, the asymmetric positioning of the acrosome, and the unusual neck articulation are discussed. Although recent observations have provided evidence of a marsupial equatorial segment and posterior ring, the marsupial equivalent of the eutherian postacrosomal sheath has not been identified. The unusual neck structure of marsupial spermatozoa and the mobile articulation of the connecting piece are discussed in relation to nuclear rotation and the events associated with this process. Increasing flagellar length in some species is associated with extremes in flagellar organization and its effect on sperm motility is discussed.

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