The growth of lymphoid tissue in the gut is fueled by TNFa. Because TNF/Rorc(gt)/ mice, who express higher amounts of TNF but lack RORgt+ LTi cells, also generate lymphoid tissue in sites of inflammation, the development of this ectopic lymphoid tissue was not contingent on the presence of conventional RORgt+ LTi cells. Surprisingly, these animals produced a number of lymph nodes that resembled those of wild type animals in both structure and function. When stromal cells were activated during the late stages of embryogenesis and when an organogenic pathway that permitted the formation of lymph nodes was activated, TNF generation by F4/80+ myeloid cells located inside the anlagen was crucial.
to know more about peripheral or secondary lymphoid organs - <u>brainly.com/question/13553292</u>
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One population that may not survive is the goundhog
Boleophthalmus boddarti is detritivorous, while others will eat small crabs, insects, snails and even other mudskippers. Digging deep burrows in soft sediments allows the fish to thermoregulate, avoid marine predators during the high tide when the fish and burrow are submerged, and lay their eggs.
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Answer:
yes cordates are bilateral
<span>Coral reefs include atolls, barrier, and fringing reefs. Not so surprisingly, coral reefs are made up of many different biological systems. Many believe that they are composed of the highest levels of biodiversity in the world.atolls, barrier, and fringing reefs are all types of reefs.</span>
