Steve Mercer/Photographer's Choice/Getty Images. Definition: The acronym HTTP stands for Hyper Text Transfer Protocol-the technology used to communicate between web servers and web users. This protocol is the foundation for large, multi-functioning, multi-input systems-like the World Wide Web.efinition: The acronym HTTP stands for Hyper Text Transfer Protocol-the technology used to communicate between web servers and web users.
B. The small terminal villi of a term placenta (hematoxylin-eosin, Ã10). C. Vasculosyncytial membrane (arrows) is the hallmark of a term villus, near fusion of the trophoblast basement membrane with the fetal capillary endothelium, with adjacent normal syncytial knots (hematoxylin-eosin, Ã40).
The general structure of the endoplasmic reticulum is a network of membranes called cisternae. These sac-like structures are held together by the cytoskeleton. The phospholipid membrane encloses a space, the cisternal space (or lumen), which is continuous with the perinuclear space but separate from the cytosol.lthough there is no continuous membrane between the endoplasmic reticulum and the Golgi apparatus, membrane-bound vesicles shuttle proteins between these two compartments. Vesicles are surrounded by coating proteins called COPI and COPII.