small structure present in the cytoplasm of the cell such as mitochondrion
a group of different tissues organized to perform a specific function
a type of nucleic acid contained in the nucleoli of cells. A component of messenger, transfer and ribosomal RNA
RNA (ribonucleic acid)
liquid absorption by cells in which a segment of cell membrane forms small pockets and engulfs the liquid. Similar to phagocytosis, except that liquids rather than particulate material are ingested.
a small cytoplasmic vaculoe containing digestive enzymes
the information carried by the codons of DNA molecules in chromosomes.
cytoplasmic organelle containing various enzymes, including those that decompose potentially toxic hydrogen peroxide.
a small cytoplasmic organelle that serves as the site of protein synthesis. Ribosomes are usually attached to the endoplasmic reticulum but may be free in the cytoplasm.
a large stellate cell having highly branched processes. forms the structural framework of the nervous system. One of the neurogilial cells.
material in which connective tissue cells are embedded
a group of cells that are derived from the fertilized ovum and are destined to form the embryo
inner cell mass
a change from one type of cell to a more resistant cell type
one type of neurogilia that surrounds nerve fibers within the central nervous system.
a high energy phosphate compound that liberate energy to power numerous cellular metabolic processes
ATP (adenperoxisoneosine triphosphate)
the outer germ layer in the embryo that gives rise to specific organ and tissues
a pathological process that results in the formation and growth of a tumor
an insoluble sulfer-containing protein that is the principal constituent of hair and nails
short cylindrical structures located adjacent to the nucleus that participate in the formation of spindle fibers during cell division
structural changes associated with cell death
a solution having essentially the same osmolarity as body fluids so that cells neither shrink nor swell when exposed to the solution.
the nerve cell including the nerve cell body and its processes
ingestion of particulate of foreign material by cells
the internal lining of blood vessels and interior of heart
protein tubules and filaments that from the structural framework of cells
the middle germ layer of the embryo which gives rise to specific organs and tissues
cell derived from the fertilized ovum that gives rise to the fetal membranes and contributes to the formation of the placenta
phagocytic cells of the nervous system comparable to macrophages in other tissues
an increase in the number of cells
a group of membrane-lined sacs found in the cytosplasm of the cell near the nucleus
a measure of osmotic pressure exerted by a solution