Short cylindrical structures that help organize the spindle fibers during cell division.
Composed of DNA and proteins; found in the nucleus; tightly packed during cell division and dispersed during normal cell operations.
Short hair-like structures that move fluid or secretions across the cell surface.
General term used to refer to the material inside the cell between the cell membrane and the nucleus; divided into the cytosol, organelles, and inclusions.
Internal protein framework of threadlike filaments and hollow tubes that give the cytoplasm flexibility and support; consists of microfilaments and microtubules.
Intracellular fluid; contains dissolved nutrients, ions, proteins, and waste products.
Endoplasmic reticulum, rough
Endoplasmic reticulum with attached ribosomes; participates in protein synthesis.
Endoplasmic reticulum, smooth
Endoplasmic reticulum without attached ribosomes; synthesizes phospholipids, cholesterol, and steroid hormones (in reproductive organs); synthesizes and stores glycogen in skeletal muscle and liver cells.
Long whip-like tail that propels the cell through fluid.
Flattened membranous sacs; involved in the synthesis and packaging of secretions and enzymes for use within the cell; renews and modifies the cell membrane when secretory vesicles fuse with the cell membrane.
Filled with digestive enzymes; involved in the defense against disease and the removal of damaged or dead cells.
Thinnest component of the cytoplasm; form a dense layer just inside the cell.
Hollow tubes built of the protein tubulin; primary component of the cytoskeleton; give the cell strength and rigidity; anchors the position of some organelles; form the spindle during cell division.
Small finger-shaped projections of the cell membrane; increase the surface area for absorption.
Convert energy stored in glucose into ATP.
Double membrane that surrounds the nuclear contents.
Openings in the nuclear envelope that allow materials to pass between the nucleus and cytoplasm.
Manufacture the components of ribosomes.
Control center for cellular operations; contains the genetic material (DNA)
Found attached to the endoplasmic reticulum; manufacture proteins for use outside the cell.
Found scattered throughout the cytoplasm; manufacture proteins for use within the cell.
Transport Golgi products to the cell membrane for release from the cell.
Transport endoplasmic reticulum products to the Golgi.