Endoplasmic reticulum
The endoplasmic reticulum (ER) is a tubular net-like structure with hollow cavities in the cytoplasm that extends from the nucleus to the cell membrane.
It serves as a protoplasmic structure and a site for protein synthesis.
It also has an internal conduction feature.
Golgi body
The Golgi body is an organelle that has a smooth, long tube or sac-like structure that stays united near the nucleus.
Proteins are stored in Golgi bodies, and hormones are secreted.