endoplasmic reticulum
consist of the blood,the heart,and an intricate network of long,slender tubes called blood vessels that originate from the heart.
The Haversian canals
Bronchioles.
The endoplasmic reticulum (ER) is the network of tubes inside a cell that holds the ribosomes. There are two types of ER: rough ER, which has ribosomes attached to its surface, and smooth ER, which does not have ribosomes. The ribosomes on rough ER are involved in protein synthesis.
Tracheal tubes
The respiratory system of insects is called the tracheal system. It consists of a network of branching tubes called tracheae that deliver oxygen directly to the cells and remove waste gases. These tubes have openings called spiracles on the surface of the insect's body.
Fallopian tubes
Blood vessels
Endoplasmic Reticulum
cytoskeleton
The sugar produced by photosynthesis in the leaf is transported through a network of tubes called phloem. These tubes carry the sugar to other parts of the plant where it is needed for energy or storage.
They are called Fallopian tubes