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Blasts
Blasts "Immature blood cells. Leukemic blasts do not grow and age normally; they proliferate wildly and fail to mature."
RELATED TERMS--------------------------------------
Blood
The life-maintaining fluid which is made up of plasma, red blood cells (erythrocytes), white blood cells (leukocytes), and platelets; blood circulates through the body's heart, arteries, veins, and capillaries; it carries away waste matter and carbon dioxide, and brings nourishment, electrolytes, hormones, vitamins, antibodies, heat, and oxygen to the tissues.
Blasts
"Immature blood cells. Leukemic blasts do not grow and age normally; they proliferate wildly and fail to mature."
SIMILAR TERMS--------------------------------------
BLAST
Abbreviation for Basic Local Alignment Search Tool, a computer program that identifies homologous genes in different organisms (such as worms, the fruit fly, mice, and humans). Homologous genes are genes in different species that share similar structures and functions.
Blast phase
Refers to advanced chronic myelogenous leukemia. In this phase, the number of immature, abnormal white blood cells in the bone marrow and blood is extremely high. Also called blast crisis.
Blastocoel
The fluid-filled cavity within the blastula.
Blastocyst
The developmental stage of the fertilized ovum by the time it is ready to implant; formed from the morula and consists of an inner cell mass, an internal cavity, and an outer layer of cells (the trophoblast).
Blastocyst cavity
The fluid-filled cavity within the blastocyst, sometimes referred to as the blastocoel.
Blastocystis hominis
The parasitic organism that causes blastocystosis. See Blastocystosis.
Blastocystis infection
See: Blastocystosis.
Blastocystosis
Infection with Blastocystis hominis, a common microscopic parasite found worldwide. Symptoms may include watery or loose stools, diarrhea, abdominal pain, anal itching, weight loss, and excess gas. Some people have no symptoms. The organism can remain in the intestines for weeks, months, or years. Diagnosis requires finding it in the stool, How Blastocystis is transmitted is unknown, although the number of people infected seems to increase in areas where sanitation and personal hygiene is inadequate. Treatment is with the antibiotics metronidazole or iodoquinol.
Blastokinin
See: Uteroglobin.
Blastoma
"A tumor thought to arise in embryonic tissue. The term ""blastoma"" is commonly used as part of the name for a tumor as, for examples, in glioblastoma and medulloblastoma (types of brain tumors), hepatoblastoma (a liver tumor), nephroblastoma ( Wilms tumor of the kidney), neuroblastoma (a childhood tumor of neural origin), osteoblastoma (a bone tumor) and retinoblastoma (a tumor of the retina)."
Blastomere
A cell from a morula-stage embryo.
Blastomyces dermatitidis
The fungus that causes a disease called blastomycosis.
Blastomycosis
Infection with a fungus called Blastomyces dermatitidis. The infection causes symptoms in about 50% of cases. It usually presents as a flu-like illness with fever, chills, productive cough, myalgia, arthralgia and pleuritic chest pain. Some patients fail to recover and develop chronic pulmonary infection or widespread disseminated infection (affecting the skin, bones, and genitourinary tract). It occasionally affects the meninges which cover the brain and spinal cord.
Blastula
Term (often used in lower vertebrates) to describe an early stage in the development of an embryo consisting of a hollow sphere of cells enclosing a fluid-filled cavity called the blastocoel. The term blastula sometimes is used interchangeably with blastocyst.
PREVIOUS AND NEXT TERMS--------------------------------------
Blastocystosis
Infection with Blastocystis hominis, a common microscopic parasite found worldwide. Symptoms may include watery or loose stools, diarrhea, abdominal pain, anal itching, weight loss, and excess gas. Some people have no symptoms. The organism can remain in the intestines for weeks, months, or years. Diagnosis requires finding it in the stool, How Blastocystis is transmitted is unknown, although the number of people infected seems to increase in areas where sanitation and personal hygiene is inadequate. Treatment is with the antibiotics metronidazole or iodoquinol.
Blastokinin
See: Uteroglobin.
Blastoma
"A tumor thought to arise in embryonic tissue. The term ""blastoma"" is commonly used as part of the name for a tumor as, for examples, in glioblastoma and medulloblastoma (types of brain tumors), hepatoblastoma (a liver tumor), nephroblastoma ( Wilms tumor of the kidney), neuroblastoma (a childhood tumor of neural origin), osteoblastoma (a bone tumor) and retinoblastoma (a tumor of the retina)."
Blastomyces dermatitidis
The fungus that causes a disease called blastomycosis.
Blastomycosis
Infection with a fungus called Blastomyces dermatitidis. The infection causes symptoms in about 50% of cases. It usually presents as a flu-like illness with fever, chills, productive cough, myalgia, arthralgia and pleuritic chest pain. Some patients fail to recover and develop chronic pulmonary infection or widespread disseminated infection (affecting the skin, bones, and genitourinary tract). It occasionally affects the meninges which cover the brain and spinal cord.
Blasts
Bleb
A bladder-like structure more than 5 mm in diameter with thin walls that may be full of fluid. Also called a bulla.
Blender experiment
See: Hershey-Chase experiment.
Blepharophimosis
Horizontal narrowing of the palpebral fissures (eye slits).
Blighted ovum
A fertilized ovum (egg) that did not develop or whose development ceased at an early stage, before 6 or 7 weeks of gestation. On the ultrasound examination of a blighted ovum, only the gestational sac that normally surrounds the embryo can be seen. There is usually no embryo inside the gestational sac.
Blind
1. Unable to see. Without part or all of the sense of sight.2. In a clinical trial, not to know the treatment given or received. The participant is not told whether they are in the experimental or control arm of the study. Also called masked.
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