42 results found

Search Results for: periphery

Periphery

periphery Origin: L. Peripheria, Gr.; around - to bear, carry: cf. F. Peripherie. 1. The outside or superficial portions of... Read More

Nervous System

    THE is the most complicated and highly organized of the various systems which make up the human body. It is the... Read More

Afferent Nerve

Afferent Nerve Definition The word ‘aferent’ means "steering or conducting something towards a destination". The... Read More

Afferent neuron

Definition noun, plural: afferent neurons A type of neuron that detects stimulus from the periphery and relays nerve... Read More

Allopatric speciation

We can define speciation as a process by which the novel genetically independent group of organisms are formed through the... Read More

Macula lutea

Macula lutea An oval area in the retina, 3 to 5 mm in diameter, usually located temporal to the posterior pole of the eye... Read More

Peripheral membrane protein

Definition noun, plural: peripheral membrane proteins A protein that temporarily adheres to the biological membrane, either... Read More

Protoxylem

Definition noun The first xylem to develop from the procambium, and characterized by narrow tracheary elements with annular,... Read More

Superficial cleavage

Definition noun (embryology) A meroblastic cleavage wherein mitosis occurs without cytokinesis, resulting in many nuclei,... Read More

Megakaryocyte

Definition noun, plural: megakaryocytes A large cell in the bone marrow with characteristic lobulate nucleus and is... Read More

Primary phloem

Definition noun The type of phloem derived from the primary meristem during the development of a vascular... Read More

Efferent nerve

Definition noun, plural: efferent nerves The type of nerve that carries nerve impulses away from the central nervous system... Read More

Metaphloem

Definition noun, plural: metaphloems A component of the primary phloem that develops often following the differentiation of... Read More

Accretions

Accretion 1. Increase by addition to the periphery of material of the same nature as that already present; e.g., the manner... Read More

Motor neuron

Definition noun, plural: motor neurons A type of neuron connected to a muscle fiber and originates from the central nervous... Read More

Anterolateral system

Definition noun A composite bundle of fibers in the ventral half of the lateral funiculus of the spinal cord, and comprised... Read More

Facultative heterochromatin

Definition noun Heterochromatin that may lose its condensed state and becomes genetically active Supplement Heterochromatin... Read More

Erythrocyte

Erythrocyte Definition Erythrocytes (red blood cells or RBCs) are the myeloid series of specialized cells that play an... Read More

Endosome

Endosome Definition noun plural: endosomes en·do·some, ˈəndoˌsoʊm (cell biology) A membrane-bound cytoplasmic... Read More

The Conscious & Unconscious Nervous System

The Central Nervous System is arguably the most important part of the body because of the way it controls the biological... Read More

Osteocyte

Osteocyte Definition The osteocyte is a mature bone cell. Other bone cell types are osteoprogenitor cells, osteoblasts, and... Read More

Adipocyte

Definition noun, plural: adipocytes A specialized connective tissue cell that stores fat (lipid); the predominant cell in... Read More

Heterochromatin

Definition noun Highly condensed, tightly packed form of chromatin, as opposed to the lightly packed... Read More

Micrometer

micrometer An instrument, used with a telescope or microscope, for measuring minute distances, or the apparent diameters of... Read More

Sympatric speciation

Speciation is a process of evolution through which two different existing populations evolve and a distinct species form. It... Read More

Peripheral

peripheral (Science: anatomy) Pertaining to or situated at or near the periphery, situated away from a centre or central... Read More

Tissue

Tissue Definition What is tissue in the body? The body tissue is an aggregation of cells that function together and have a... Read More

Vitreous humor

Definition noun The clear, gel-like body fluid in the vitreous chamber, i.e. the posterior cavity between the lens and the... Read More

Cell membrane

Cell Membrane Definition Just like any non-living body possesses a plastic or paper packaging material that keeps the... Read More

Transport

In biology, transport refers to the act or the means by which a molecule or ion is moved across the cell membrane or via the... Read More

Castration cells

Castration cells Altered basophilic cells of the anterior lobe of the pituitary that develop following castration; the body... Read More

Zygote

Zygote Definition What is a zygote? A zygote is a fertilized eukaryotic cell. In biology, medical science, and other allied... Read More

Xylem

Xylem Definition Xylem is defined as a plant tissue that transfers water and nutrients from roots to all over the plant... Read More

Axon

What Is Axon? An axon is a thin, long fiber of a nerve cell (or neuron). It transmits electrical impulses from the cell... Read More

Platelet

Definition noun, plural: platelets A discoid cellular fragment (2–3 µm diameter) important for blood coagulation and for... Read More

Tigroid retina

tigroid retina --> tessellated fundus A normal fundus to which a deeply pigmented choroid gives the appearance of dark... Read More

Membrane protein

Definition noun, plural: membrane proteins A type of protein that is attached to, or associated with, a biological... Read More

Langhans giant cell

Definition noun, plural: Langhans giant cells A type of giant cell formed by the fusion of epithelioid macrophages, and... Read More

Cilium

Cilia Definition Cilia are hair-like structures found on the surface of many types of cells, including some mammalian... Read More

Axon hillock

Axon Hillock Definition What is axon hillock? If you are familiar with the different parts of the neuron, the axon hillock... Read More