| 单词 | membrane |
| 释义 | membrane (once / 1087 pages) n A membrane is a thin layer of something. For an example of a membrane, you don’t have to look far: your skin is a kind of membrane. Membranes are thin and flexible, but usually still strong enough to protect what’s inside or underneath them. Biologists often study membranes, such as those that surround your cells and organs. There are also membranes that don’t have anything to do with biology. A high-tech jacket might have a waterproof membrane to keep you dry in the rain. WORD FAMILYmembrane: membranes, membranous USAGE EXAMPLESInside, a gaggle of mostly white students were finishing up a short biology quiz on cell membranes. New York Times(Dec 12, 2016) The membranes between comfort and chaos are much thinner than we think. New York Times(Dec 11, 2016) The autophagosomes are sealed by a double membrane that keeps in the junk. New York Times(Dec 04, 2016) 1n a pliable sheet of tissue that covers or lines or connects the organs or cells of animals or plants Syn|Hypo|Hyper tissue layer trophoblast the membrane that forms the wall of the blastocyst in early development; aids implantation in the uterine wall chorioallantoic membrane, chorioallantoisthe very vascular fetal membrane composed of the fused chorion and adjacent wall of the allantois webmembrane connecting the toes of some aquatic birds and mammals Bowman's capsule, capsula glomeruli, glomerular capsulethin double membrane surrounding the glomerulus of a nephron axolemmaouter membrane covering an axon basilar membranea membrane in the cochlea that supports the organ of Corti fetal membraneany membrane that functions for the protection or nourishment or respiration or excretion of a developing fetus choroid, choroid coata highly vascular membrane in the eye between the retina and the sclera; a dark pigmentation minimizes the scattering of light inside the eye ciliary bodythe part of the tunic of the eye between the choroid coat and the iris corneathe transparent dome-shaped anterior portion of the outer covering of the eye; it covers the iris and pupil and is continuous with the sclera diaphragm, midriff(anatomy) a muscular partition separating the abdominal and thoracic cavities; functions in respiration eardrum, myringa, tympanic membrane, tympanumthe membrane in the ear that vibrates to sound endocraniummembrane lining the inside of the skull endosteumvascular membrane that lines the inner surface of long bones ependymathin epithelial membrane lining the ventricles of the brain and the spinal cord canal fertilization membranethe membrane that forms around a fertilized ovum and prevents penetration by additional spermatozoon hyaloid, hyaloid membranethe transparent membrane enveloping the vitreous humor of the eye and separating it from the retina intimathe innermost membrane of an organ (especially the inner lining of an artery or vein or lymphatic vessel) irismuscular diaphragm that controls the size of the pupil which in turn controls the amount of light that enters the eye; it forms the colored portion of the eye lamellaa thin membrane that is one of the calcified layers that form bones meninges, meninxa membrane (one of 3) that envelops the brain and spinal cord mucosa, mucous membranemucus-secreting membrane lining all body cavities or passages that communicate with the exterior periosteuma dense fibrous membrane covering the surface of bones (except at their extremities) and serving as an attachment for tendons and muscles; contains nerves and blood vessels that nourish the enclosed bone peritheliumtissue layer around small blood vessels retinathe innermost light-sensitive membrane covering the back wall of the eyeball; it is continuous with the optic nerve sarcolemmaan extensible membrane enclosing the contractile substance of a muscle fiber semipermeable membranea membrane (as a cell membrane) that allows some molecules to pass through but not others serosa, serous membranea thin membrane lining the closed cavities of the body; has two layers with a space between that is filled with serous fluid synovial membrane, synoviuma thin membrane in synovial (freely moving) joints that lines the joint capsule and secretes synovial fluid adventitia, tunic, tunicaan enveloping or covering membrane or layer of body tissue allantoisthe vascular fetal membrane that lies below the chorion and develops from the hindgut in many embryonic higher vertebrates (reptiles, birds and mammals) caul, embryonic membrane, veilthe inner membrane of embryos in higher vertebrates (especially when covering the head at birth) cell membrane, cytomembrane, plasma membranea thin membrane (a double layer of lipids) enclosing the cytoplasm of a cell; proteins in the membrane control passage of ions (like sodium or potassium or calcium) in and out of the cell conjunctivaa transparent lubricating mucous membrane that covers the eyeball and the under surface of the eyelid arcus, arcus senilisa whitish deposit in the shape of an arc that is sometimes seen in the cornea perforated eardruman eardrum with a hole or tear in it; can interfere with normal hearing and cause other ear problems pleurathe thin serous membrane around the lungs and inner walls of the chest peritoneuma transparent membrane that lines the abdominal cavity in mammals and covers most of the viscera endocardiumthe membrane that lines the cavities of the heart and forms part of the heart valves pericardiuma serous membrane with two layers that surrounds the heart epicardium, visceral pericardiumthe innermost of the two layers of the pericardium parietal pericardiumthe tough outermost layer of the pericardium that is attached to the diaphragm and the sternum leptomeningesthe two innermost layers of the meninges; cerebrospinal fluid circulates between these innermost layers dura, dura materthe outermost (and toughest) of the 3 meninges arachnoid, arachnoid membranethe middle of the 3 meninges pia materthe highly vascular innermost of the 3 meninges endometrium(pregnancy) the mucous membrane that lines the uterus; thickens under hormonal control and (if pregnancy does not occur) is shed in menstruation; if pregnancy occurs it is shed along with the placenta at parturition umbilical, umbilical cordmembranous duct connecting the fetus with the placenta hymen, maidenhead, virginal membranea fold of tissue that partly covers the entrance to the vagina of a virgin albugineawhitish tunic animal tissue the tissue in the bodies of animals 2n a thin pliable sheet of material Hypo|Hyper drumhead, head a membrane that is stretched taut over a drum gel, gelatina thin translucent membrane used over stage lights for color effects flat solid, sheet a flat artifact that is thin relative to its length and width |
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