These ducts are made of tissue of mesodermal origin.

These cells were used rather than square Pyrex tubing because of the tendency of the latter to shatter when thawing frozen carbon tetrachloride.

These antibody titers were determined by reaction with homozygous Af red cells.

These cells were thawed at 37-degrees-C for 30 min and were deglycerolized by alternately centrifuging and mixing with descending concentrations of glycerol solutions ( 20, 18, 10, 8, 4 and 2% ).

These protists live as individual amoebae until starved, at which point they aggregate and form a multicellular fruiting body in which some cells sacrifice themselves to promote the survival of other cells in the fruiting body.

These particles continue to decay, emitting alpha particles which can damage cells in the lung tissue.

These antigens can sometimes be presented by tumor cells and never by the normal ones.

These are released by lysis of the host cells and group together by syzygy.

These secrete enzymes that allow the parasite to enter other cells.

These molecules mark the cell for phagocytosis by cells possessing the appropriate receptors, such as macrophages.

These two inhibitory proteins are partially responsible for HeLa cells immortality by inhibiting apoptosis to occur.

These bacteria also secrete proteins that enable the AC-II to enter host cells, where the exogenous AC activity undermines normal cellular processes.

These oxidants can damage cells by starting chemical chain reactions such as lipid peroxidation, or by oxidizing DNA or proteins.

These neurons communicate with one another by means of long protoplasmic fibers called axons, which carry trains of signal pulses called action potentials to distant parts of the brain or body targeting specific recipient cells.

These same compounds also increase secretion of macrophage colony-stimulating factor by osteoblasts, which promotes the differentiation of progenitor cells into osteoclasts, and decrease secretion of osteoprotegerin.

These domains reflect whether the cells have nuclei or not, as well as differences in the chemical composition of the cell exteriors and ribosomes.

These tailor-made drugs promise not only to maximize therapeutic effects but also to decrease damage to nearby healthy cells.

These include the use of genetic information in reproductive decision-making and the possibility of genetically altering reproductive cells that may be passed on to future generations.

These are epithelial cells that are coated with bacteria.

These proteins are often concentrated in specialized cells and in cell corners.

These ideas include the proposal that cells contain zones of low and high-density water, which could have widespread effects on the structures and functions of the other parts of the cell.

These can take part in self-perpetuating circuits in the gene regulatory network, circuits that can involve several cells that communicate with each other.

These cells and the bacteria trapped inside them entered a symbiotic relationship, a close association between different types of organisms over an extended time.

These principles are motivated by neuroscience insights about learning at the level of nerve cells ( synaptic plasticity ) and the coupling between cortical systems for language and action in the human brain.

These effects are likely mediated in the inferior olive, specifically at low-threshold calcium channels ( LTCC ) which have been shown to modulate the rhythmic firing of cells in this area.

These banks may slowly migrate along the coast in the direction of the longshore drift, alternately protecting and exposing parts of the coastline.

These point defects can migrate and cluster with each other, resulting in dislocation loops and other defects.

These solvents, usually acidic, migrate through the weathering rock after leaching through upper weathered layers.

These cytokine factors are released into general circulation, where they migrate to the circumventricular organs of the brain due to easier absorption caused by the blood – brain barrier's reduced filtration action there.

These may cause pain, become infected, rupture and bleed, block the bile duct and cause jaundice, or migrate around the abdomen.

These sprouts then form loops to become a full-fledged vessel lumen as cells migrate to the site of angiogenesis.

These two words go back to the time before the Separation of the Elves, or rather to the time of the debate among them about the invitation by the Valar to migrate to Valinor.

These are made up of early Sertoli cells that surround and nurture the germ cells that migrate into the gonads shortly before sex determination begins.

These Monarchs migrate 2000 miles to reach Pacific Grove after their summer in Canada, often soaring as high as 3000 meters.

These birds come to Cuba every year from North America in the north hemisphere winter season. Arctic Terns breed in the arctic and subarctic and winter in Antarctica. Like many birds, seabirds often migrate after the breeding season.

These cells have the ability to migrate long distances, allowing chromatophores to populate many organs of the body, including the skin, eye, ear and brain.

These birds migrate in the daytime.

These birds migrate in winter, mostly to the Pacific Coast where they range south to El Salvador on a regular basis ; vagrants may occur as far as Costa Rica.

These offspring have underdeveloped posterior limbs ( the pes can be webbed ), and following birth they migrate to the pouch where they attach to a nipple.

These cells then migrate to lymph nodes where they present the urushiol to T-lymphocytes and thus recruit them to the skin.

These birds do not migrate.

These birds migrate south ( mostly via the Central and Mississippi Flyways ) when the young are fledged and return in early spring, usually arriving on the breeding ground in May.

These sporozoites migrate to the salivary glands of the mosquito where they are injected into the blood and subcutaneous tissue of the next host the mosquito bites.

These being his grandsons Danfi, Tsedakah, Mafraj and Sarawi Further afield, in northeast India, the Mizo Jews claim descent from Manasseh, and call themselves Bnei Menashe ; in 2005 Shlomo Amar, Sephardi Chief Rabbi of Israel, announced that he regarded this claim to be true, which under the Law of Return allows them to migrate to Israel, as long as they formally convert to Israel's official form of Judaism.

These birds migrate to the United States or southern Canada to spend the winter.

These birds migrate to the southeastern United States, West Indies and Central America, leaving their summer range.

These birds migrate south and vacate areas at higher elevations.

These migrate to the southwestern United States and Mexico.

These birds have an unusual migration pattern as every few years in winter they migrate southwards in large numbers.