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
Photosynthesis
Photosynthesis is a physio-chemical process carried out by photo-auto-lithotrophs by converting light energy into chemical... 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
Neurilemma
Neurilemma Neurolemma (also neurilemma and sheath of Schwann) is the outermost layer of nerve fibers in the peripheral... 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
Unmyelinated neuron
Definition noun A neuron in which there is no myelin sheath surrounding the axon. Supplement The unmyelinated neuron... 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
Medullary Sheath
A layer of myelin encasing (and insulating) the axons of medullated nerve... 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
Afferent Nerve
Afferent Nerve Definition The word ‘aferent’ means "steering or conducting something towards a destination". The... Read More
Cyanobacteria
Cyanobacteria Definition Cyanobacteria is a group of photosynthetic bacteria widely distributed in various aquatic habitats... 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
Muscular system
Muscular System Definition What is the muscular system? The muscular system is a system that includes muscle cells and... 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
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
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
Light-independent reaction
The process of photosynthesis is a biological procedure in which plants produce oxygen and energy (sugar) by using light... Read More
Nervous tissue
Nervous Tissue Definition Nerve cells (or neurons) and their associated cells, such as neuroglia cells, make up nervous... Read More
Muscle spindle
Definition noun The neuromuscular spindle is a fusiform mechanoreceptor (specifically a stretch receptor) within the... Read More
Hsk pathway
Definition noun An abbreviation for hatch slack kortshak pathway: a metabolic pathway first determined by Burr and Kortshak... Read More
Vagina fibrosa tendinis
vagina fibrosa tendinis fibrous tendon... Read More
Carbon fixation
Carbon Fixation Definition We know that the earth contains many elements. The periodic table shows us just how many... Read More
Perineurium
perineurium (Science: anatomy) The connective tissue sheath which surrounds a bundle of nerve fibres. See epineurium, and... Read More
Common tendinous ring
Common tendinous ring a fibrous ring that surrounds the optic canal and the medial part of the superior orbital fissure; it... Read More