GENERAL HISTOLOGY

Detailed explanation-1: -Endoplasmic reticulum is a network of membranes inside a cell through which proteins and other molecules move. Proteins are assembled at organelles called ribosomes.

Detailed explanation-2: -Endoplasmic Reticulum (E.R.)-Passageways that carry proteins, etc. from one place to another. Hollow tubular structures that travel around the cytoplasm. Ribosome-Grain-like bodies that produce proteins.

Detailed explanation-3: -(c) The ER (endoplasmic reticulum) functions both as passageway for intracellular transport and as a manufacturing surface.

Detailed explanation-4: -A protein called coat protein II (COPII; green) forms vesicles that transport from the endoplasmic reticulum (ER) to the Golgi. A different protein called coat protein I (COPI; red) forms vesicles for transport in the other direction, from the Golgi to the ER.

Detailed explanation-5: -The rough endoplasmic reticulum has on it ribosomes, which are small, round organelles whose function it is to make those proteins.