Chapter Eight 

Centrioles are paired barrel-shaped organelles located in the cytoplasm

centrioles are made up of nine circularly arranged triplet microtubules

a triplet structure, found only in centrioles. This structure consists of a complete A-tubule

and associated partial B-tubule attached to the A-tubule wall, and a partial C-tubule attached to the B-tubule wall.

renal tubule collects the products that are filtered out of the blood. Vital water, electrolytes, amino acids, and ions are captured while the excess is eliminated 

near the nuclear envelope 

to act as a barrier that separates the contents of the nucleus from the cytoplasm

The cytoplasm is the gelatinous liquid that fills the inside of a cell

Centrioles play a role in organizing microtubules

that serve as the cell's skeletal system. They help determine the locations of the nucleus and other organelles within the cell.