medullary cavity

(redirected from bone marrow cavity)


1. a hollow or space, or a potential space, within the body or one of its organs; called also caverna and cavum.
2. the lesion produced by dental caries.
Cavities in the body. From Applegate, 2000.
abdominal cavity the cavity of the body between the diaphragm above and the pelvis below, containing the abdominal organs.
absorption c's cavities in developing compact bone due to osteoclastic erosion, usually occurring in the areas laid down first.
amniotic cavity the closed sac between the embryo and the amnion, containing the amniotic fluid.
cranial cavity the space enclosed by the bones of the cranium.
glenoid cavity a depression in the lateral angle of the scapula for articulation with the humerus.
marrow cavity (medullary cavity) the cavity that contains bone marrow in the diaphysis of a long bone; called also medullary canal.
nasal cavity the proximal portion of the passages of the respiratory system, extending from the nares to the pharynx; it is divided into left and right halves by the nasal septum and is separated from the oral cavity by the hard palate.
oral cavity the cavity of the mouth, bounded by the jaw bones and associated structures (muscles and mucosa).
pelvic cavity the space within the walls of the pelvis.
pericardial cavity the potential space between the epicardium and the parietal layer of the serous pericardium.
peritoneal cavity the potential space between the parietal and the visceral peritoneum.
pleural cavity the potential space between the two layers of pleura.
pulp cavity the pulp-filled central chamber in the crown of a tooth.
cavity of septum pellucidum the median cleft between the two laminae of the septum pellucidum. Called also pseudocele, pseudocoele, and fifth ventricle.
serous cavity a coelomic cavity, like that enclosed by the pericardium, peritoneum, or pleura, not communicating with the outside of the body and lined with a serous membrane, i.e., one which secretes a serous fluid.
tension cavity cavities of the lung in which the air pressure is greater than that of the atmosphere.
thoracic cavity the portion of the ventral body cavity situated between the neck and the diaphragm; it contains the pleural cavity.
tympanic cavity the major portion of the middle ear, consisting of a narrow air-filled cavity in the temporal bone that contains the auditory ossicles and communicates with the mastoid air cells and the mastoid antrum by means of the aditus and the nasopharynx by means of the auditory tube. The middle ear and the tympanic cavity were formerly regarded as being synonymous.
uterine cavity the flattened space within the uterus communicating proximally on either side with the fallopian tubes and below with the vagina.

med·ul·lar·y cav·i·ty

the marrow cavity in the shaft of a long bone.

medullary cavity

The hollow spaces of the diaphyses of long bones, which house the marrow.

med·ul·lar·y ca·vi·ty

(med'ŭ-lar'ē kav'i-tē) [TA]
The marrow cavity in the shaft of a long bone.


emanating from or pertaining to a medulla. Used most frequently in relation to diseases of glands, e.g. thyroids, or gland-like structures, e.g. lymph nodes.

medullary cavity
cavity of the bone marrow.
medullary cord
cords of tissue in lymph nodes; may be hyperplastic in cases of chronic localized disease.
medullary reticular formation
the part of the medulla oblongata which controls the trigeminal, facial, vagal and hypoglossal nerve nuclei.
medullary sinus
part of the flow system for lymph through lymph nodes; drain into efferent lymphatic vessels at the node hilus.
References in periodicals archive ?
At 10 weeks, the CS-PRP implant stimulated the cortical bone formation and partial development of the bone marrow cavity [Figure 1]c.
It consists of specialized bone cells, mineralized and unmineralized connective tissue matrix, and spaces including the bone marrow cavity, vascular canals, canaliculi, and lacunae that contain osteocytes.
The hematological findings which are seen in the present case are due to obliteration of the bone marrow cavity by the abnormal bone leading to pancytopenia, thrombocytopenia, leukopenia and hemolytic anemia.
During first three days of the experiment the inflammatory process in the bone was visualized as the groupings of gray and yellow exudates within bone marrow cavity, sometimes in subperiosteal space and sometimes in soft tissues of the limb.
The composition of cells in the bone marrow cavity has an important influence on the productivity of blood stem cells.
Extramedullary hematopoiesis (EM H) is the production of hematopoietic precursors outside the bone marrow cavity, and it causes mass effects according to its localization.
Extramedullary hematopoiesis is the production of blood elements outside the bone marrow cavity.
Leukemia cells accumulate in the bone marrow cavity, ultimately replacing most of the normal hematopoietic cells, resulting in the signs and symptoms of the disease.
The builder osteoblasts produce and store growth factors in bone which may serve as essential nutrients for cancer cells, and these factors are released continually into the bone marrow cavity during bone remodeling.