Histology-World!

 

 

 

Histology Glossary

 

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z


M line
Center of the H band in a sarcomere

Macrophage
Phagocytic cell derived from monocytes

Macula adherens
Type of cell junction; important juction within epithelial tissue; desmosome

Macula densa
Specialized cells in the distal convoluted tubule; part of the juxtaglomerular apparatus

Macula pellucida
Stigma; site on the surface of the ovary where oocyte rupture occurs

Mall's space
Region in liver where lymph is formed

Malpighian corpuscle
1. Renal corpuscle
2. Splenic nodule

MALT
Mucosal associated lymphatic tissue

Martinotti cell
Type of nerve cell found in the cerebral cortex

Mast cells
Connective tissue cell with granules which contain heparin and histamine

Medulla
Inner portion of organ

Megakaryocyte
Giant cell found in the bone marrow; fragments form platelets

Meiosis
Process of nuclear division during the generation of sex cell which cuts the number of chromosomes in half

Meissner's corpuscle
Tactile receptors sensitive to light touch found in the dermis

Meissner's plexus
Submucosal plexus of the gastrointestinal tract

Melanin
Dark pigment formed by melanocytes

Melanocyte
Cells in the skin at the epidermal/dermal junction which produce melanin

Membrane bone
Bone which forms from direct deposit, as opposed to from a cartilagenous model

Memory cell
Lymphocyte that has been exposed to a specific antigen so that when re-exposed to that antigen it can recognize the antigen and rapidly divide

Merkel cell
Tactile receptor in the skin

Mesenchyme
Embryonic connective tissue

Mesangial cells
Cell type seen in the glomerulus; interstitial cells

Mesothelium
Type of epithelium which lines some internal body cavities

Metamyelocyte
Cell type in granulopoiesis

Metarteriole
Vessel which is in between arteriole and capillary

Microglia
Type of neuroglia; CNS macrophages

Microvilli
Projections on the apical surface of some epithelial cells which increase the surface area for absorpiton

Mitochondria
Cellular organelles which generates ATP; powerhouse of the cell

Mitosis
Nuclear division seen with cell division

Mixed glands
Glands which are composed of both serous cells and mucous cells

Monocyte
Agranular white blood cell; largest white blood cell

Mucosa
Mucous membrane; lining of passageways

Mucos connective tissue
Type of mesenchyme

Mucous neck cell
A type of mucous secreting cell found in the stomach

Mueller cell
Supporting cell in the retina

Multipolar cell
Cell with many processes

Muscle fiber
Muscle cell

Myelin
Fatty sheeth surrounding nerve cell processes

Myelocyte
Cell type seen in granulopoiesis

Myeloid
Cell line in the bone marrow

Myenteric plexus
Plexus that is between the two layers of external muscle in the GI tract; Auerbach's plexus

Myoepithelial cells
Embryologically from ectoderm; contactile cells

Myofibril
Longitudinal unit within a muscle fiber

Myosin
Contractile protein that is very prevalent in muscle

Nail bed
Structure that the nail plate rests on

Natural killer cell
Type of lymphocyte; NK cell

Nephron
The functional unit of the kidney which is composed of a glomerulus and a uriniferous tubule

Neurofilaments
Intermediate fibers of neurons

Neuroglia
Supporting cells of the central nervous system

Neurolemma
Outermost covering of nerve fiber; also spelled neurilemma

Neuron
Nerve cell

Neurosecretory cell
Neuron which secretes a hormone

Neutrophil
Type of white blood cell; granulocyte in which the granules show no particicular attraction for either acidic or basic dyes

Nissl bodies
Distinctive rough endoplasmic reticulum and ribosomes seen in neurons

Node of Ranvier
Area between two Schwann cells which is not covered by myelin

Nonlamellar bone
Immature bone; woven bone

Normoblast
Cell seen in erythropoiesis which has a compact nucleus

Nucleolus
Region in the nucleus of a cell where ribosomal RNA production occurs

Nucleus
Part of the cell which contains the genetic information

Histology hint from Sarah Bellham: If you are studying histology or involved in health care, you need a medical dictionary. You may as well get one as early in your career as possible to maximize the benefit. I recommend: Stedman's Medical Dictionary or Dorland's Illustrated Medical Dictionary, 30th Edition.