Reticular Connective Tissue Definition A kind of connective tissue characterised by the preponderance of type III collagen reticular fibres that produce a labyrinth-like stroma for lymphocytes. One of the most…
Substance Definition The word substance comes from the Latin word substantia, which literally means "to stand under." (1) The physical matter, material, or substance that makes up an organ or…
Synonymous Definition Having the same meaning as a synonym; expressing the same thing; communicating the same, or nearly same, concept. Synonymously, these phrases are made up of two assertions that…
Vacuole Definition Vacuolum is a shortened version of the word vacuum in Latin. An intracellular secretion, excretion, storage, and digestion membrane-bound vesicle located in the cytoplasm of a cell. A…
Voluntary Muscles Definition A muscle that can be voluntarily controlled. Some of the body's muscles can be intentionally controlled. Other muscles function at a subconscious level. Voluntary muscles are those…
Zoology Definition The word comes from the Greek words zôion ("animal") and lógos ("knowledge"). The study of the anatomy, physiology, development, and categorization of animals is a field of biology…
Absorption Definition The word absorption comes from the Latin word absorptio, which means "to absorb." In a broad sense, absorption refers to the act or process of absorbing or assimilating…
Phosphate Group Definition A negative-charged functional group or radical composed primarily of phosphorus connected to four oxygen atoms. The sign PO4– is used to represent it. The phosphate group plays…
Ploidy Definition The number of homologous chromosomal sets that make up a cell's or organism's genome. The number of sets of homologous chromosomes in a cell's or organism's genome is…
Variation Definition A divergence or deviation from a recognised norm or standard (e.g., in structure, form, or function). In genetics: Differences in genetics within and between species or populations. A…