49 results found

Search Results for: sheath

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

Sheath

sheath A protective covering. The lower part of leaf enveloping stem or culm. A secreted, tubular structure formed around... Read More

Sheathed

sheathed 1. Povided with, or inclosed in, sheath. 2. (Science: botany) Invested by a sheath, or cylindrical membranaceous... Read More

Plant Metabolism

Introduction Plants are responsible for incredible feats of molecular transformation. The processes are always being... Read More

Intercalary meristem

The basic structural framework of plants is composed of different types of tissues. Based upon the capacity to divide, the... Read More

The Central Nervous System

Myelin Sheath Myelin is a substance that forms the myelin sheath associated with nerve cells. This sheath is a layer of... 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

Myelin

Definition noun A substance comprised mainly of fatty material (about 80%) and proteins (about 20%), and forms the myelin... Read More

Unmyelinated neuron

Definition noun A neuron in which there is no myelin sheath surrounding the axon. Supplement The unmyelinated neuron... Read More

Neurilemma

Neurilemma Neurolemma (also neurilemma and sheath of Schwann) is the outermost layer of nerve fibers in the peripheral... Read More

Unmyelinated nerve

Definition noun A nerve that is bare or without the myelin sheath around the axon. Supplement The unmyelinated nerve... Read More

C4 plant

Definition noun (botany) (1) A plant that utilizes the C4 carbon fixation pathway in which the CO2 is first bound to a... Read More

Medullary Sheath

A layer of myelin encasing (and insulating) the axons of medullated nerve... Read More

Nerve

nerve 1. (Science: anatomy) One of the whitish and elastic bundles of fibres, with the accompanying tissues, which transmit... Read More

Afferent Nerve

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

Cyanobacteria

Cyanobacteria is a phylum comprised of photosynthetic bacteria that live in aquatic habitats and moist soils. Others are... Read More

Vagina interna nervi optici

vagina interna nervi optici --> internal sheath of optic nerve (Science: anatomy, nerve) The innermost sheath around the... Read More

Myelinated nerve

Definition noun A nerve cell in which the axon is surrounded by a layer of Schwann cell membranes of myelin... Read More

Myelinated neuron

Definition noun A neuron in which the axon is enveloped by a layer of Schwann cell membranes (sheath). Supplement The myelin... Read More

Banana

Banana (Science: botany) a perennial herbaceous plant of almost treelike size (musa sapientum); also, its edible fruit. See... Read More

C4 carbon fixation pathway

Definition noun A metabolic pathway where CO2 is first added to phosphoenolpyruvate by the enzyme, PEP carboxylase,... Read More

Hatch-Slack pathway

Definition noun A metabolic pathway first delineated in depth by M. D. Hatch and C. R. Slack (in 1966). In this pathway, the... Read More

Light-independent reaction

The process of photosynthesis is a biological procedure in which plants produce oxygen and energy (sugar) by using light... Read More

Shed

shed 1. To fall in drops; to pour. Such a rain down from the welkin shadde. (Chaucer) 2. To let fall the parts, as seeds or... Read More

Axon terminal

An axon terminal is any of the button-like endings of axons through which axons make synaptic contacts with other nerve... Read More

Osteocyte

Definition noun, plural: osteocytes A stellate, non-dividing osteoblast embedded in mature bony tissue Supplement Bone cells... Read More

Sulfatide

Definition noun, plural: sulfatides A cerebroside sulfuric ester containing one or more sulfate groups in the sugar portion... Read More

Stems

External Form of a Woody Twig A woody twig, or stem, is an axis with leaves attached. The leaves are arranged in various... Read More

Leaves

Leaves are highly efficient solar energy converters. They capture light energy and through the process of photosynthesis.... Read More

Anterolateral

Definition adjective (anatomy) In front of the body, away from the middle line Supplement The term anterolateral is used in... Read More

Neural Control Mechanisms

Nerve cells called neurons generate electric signals that pass from one end of the cell to another and release chemical... Read More

Muscle spindle

Definition noun The neuromuscular spindle is a fusiform mechanoreceptor (specifically a stretch receptor) within the... Read More

Hair cast

Hair cast 1. A cast composed of parakeratotic scales attached to scalp hair but freely movable up and down the hair shaft;... Read More

Linea arcuata

Linea arcuata --> arcuate line An arching or bow-shaped line. See: arcuate line of ilium, arcuate line of rectus... Read More

Coleocele

Coleocele Synonym: colpocele. Origin: g. Koleos, sheath, - kele,... Read More

Hsk pathway

Definition noun An abbreviation for hatch slack kortshak pathway: a metabolic pathway first determined by Burr and Kortshak... Read More

Sarcolemma

Sarcolemma Definition What is the sarcolemma? It is the thin, transparent, extensible plasma membrane of the muscle cell.... 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

Tentacle

Something that acts like a tentacle in its ability to grasp; caught in the tentacles of organized crime.Any of various... Read More

Dental enamel

Dental enamel (Science: dentistry) a hard thin translucent layer of calcified substance which envelops and protects the... Read More