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Tag: "sac" at biology news

Male reindeer inflate a large air sac in the neck region to emit their hoarse rutting calls

...ding to gender. Adult males have a much larger air sac than females and the young. In early life, growth of the air sac seems to be comparable in male and female reindeer until they reach the age of two–three years, at w...

Study shows how herpes infects cornea, evades immune cells

...ontaining the herpes virus genome emerges from the sac undamaged and able to infect the cell. "This raises the interesting possibility that herpes may be able to evade the immune system defenses in the same way," he said. "Understanding herpes' unusual pathway for infecting the stroma cells opens up new...

Steep oxygen decline halted first land colonization by Earth's sea creatures

...'s an explanation for that, and it is that the air sac breathing system in dinosaurs and their descendants, modern birds, is more efficient than systems used by other organisms," Ward said. He and his colleagues tested that hypothesis by examining the breathing system used by birds. They found that at...

How to grow a bigger brain

...ins, stay among the gravel and live off their yolk sac until they emerge as free-swimming fry. In hatcheries, the fish are reared in tanks of clean, well-aerated water, but without environmental features or enrichment. Earlier work by Nevitt's lab at UC Davis and other labs has shown differences between...

Dangerous tricksters: Some bacterie use immune cells to reproduce

...own cell membrane like a hood, creating a membrane sac in which the intruder is trapped. This 'phagosome' (from Greek phagein = to eat) cuts itself off into the inside of the macrophage and is now the point on which all the macrophage's offensive weaponry is concentrated: the phagosome is flooded with ox...

Sleeping Sickness Epidemic Spreading in Uganda

...ger be present, and women may carry a placenta and sac of amniotic fluid. In all of these cases, the standard treatment is a surgical procedure known as vacuum aspiration. In this procedure, the cervix is dilated, and a suction device is used to remove the uterine contents. As an alternative, women and ...

Drug Offers Alternative to Surgical Treatment After Miscarriage

...ger be present, and women may carry a placenta and sac of amniotic fluid. In all of these cases, the standard treatment is a surgical procedure known as vacuum aspiration. In this procedure, the cervix is dilated, and a suction device is used to remove the uterine contents. As an alternative, women and ...

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