inner cell mass


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Related to inner cell mass: blastocyst, trophoblast, blastocyst cavity, embryoblast

mass

 [mas]
1. a lump or collection of cohering particles.
2. that characteristic of matter that gives it inertia. Symbol m.
atomic mass atomic weight; see also atomic mass unit.
inner cell mass an internal cluster of cells at the embryonic pole of the blastocyst which develops into the body of the embryo.
lean body mass that part of the body including all its components except neutral storage lipid; in essence, the fat-free mass of the body.
relative molecular mass technically preferable term for molecular weight.

em·bry·o·blast

(em'brē-ō-blast'),
The mass of cells at the embryonic pole of the blastocyst that forms the embryo and some extraembryonic or adnexal tissues.
Synonym(s): inner cell mass
[embryo- + G. blastos, germ]

inner cell mass

Etymology: AS, innera, within; L, cella, storeroom, massa, lump
a cluster of cells localized at the animal pole of the blastocyst of placental mammals from which the embryo develops. See also trophoblast. Also called cell mass.

em·bry·o·blast

(em'brē-ō-blast)
The cells at the embryonic pole of the blastocyst concerned with formation of the embryo per se.
Synonym(s): inner cell mass.
[embryo- + G. blastos, germ]

mass

1. a lump or collection of cohering particles.
2. that characteristic of matter which gives it inertia.

mass-action ratios
the ratio of substrate to product, where the predominance of one, usually the substrate, over the other thermodynamically favors a particular direction for a reaction.
inner cell mass
an internal cluster of cells at the embryonic pole of the blastocyst which develops into the body of the embryo.
lean body mass
that part of the body including all its components except neutral storage lipid; in essence, the fat-free mass of the body.
mass medication
(or immunization, or treatment, or prophylaxis, or testing, or screening) application of the procedure to all of the animals in the population, which may be as small as a herd or as large as a national herd. This sort of strategy has been used extensively and for many years in the control of diseases of animals, and has been the principal reason for the dramatic virtual eradication of the major plagues in many countries. The unintelligent extension of the strategy to the control of wastage caused by endemic disease has contributed most to the problem of residues of antibacterial drugs in the human food chain. See also mass medication.
mass number
the number used to express the mass of a nucleus, being the total number of nucleons, protons and neutrons in the nucleus of an atom or nuclide; symbol A.
mass reflex
reflex actions by all the body parts controlled by the part of the spinal cord which has been injured.
thalamic intermediate mass
References in periodicals archive ?
The re-expansion rate, number of inner cell mass, total cell and proportion of inner cell to total cell of blastocysts in the four groups were calculated.
The cells of an inner cell mass are in the midst of dedifferentiation, and they usually have large autophagosomes in which we found glutinous granules (Fig.
During this process the cells of the inner cell mass migrate to certain places within the blastocyst so as to produce the cell-sheets from which all of the organs of the adult organism will arise.
For differential staining of inner cell mass (ICM) and TE cell compartments, the blastocysts which had been stained by PI were incubated in Triton X-100 prepared in the base medium for 20 seconds.
Scientists removed the outer cell layer and grew the inner cell mass in a petri dish to form a stem cell line, or group of continuously dividing cells.
Okarma and Thomson provide an overview on what human embryonic stem cells are and their source B the inner cell mass of a 5-day old embryo, the blastocyst.
It is from this inner cell mass that ESCs can be obtained.
The criteria state that the stem cell lines may be used providing "(1) the derivation process (which commences with the removal of the inner cell mass from the blastocyst) had already been initiated and (2) the embryo from which the stem cell line was derived no longer had the possibility of development as a human being.
The source of tissue used to develop human stem cell lines is important because there is much wider ethical agreement about the acceptability of using aborted fetal tissue as a source (particularly if such tissue is obtained as a result of spontaneous abortion or miscarriage) than there is about the use of the inner cell mass of human embryos.
Human embryonic stem cells (hESCs) are stem cells derived from the inner cell mass of a blastocyst, which is a stage reach 4-5 days post fertilization.
This system uses a newly discovered growth factor that is only expressed in the naive cells of the inner cell mass during the earliest days of embryogenesis.