The development of lymphoid and haemopoietic tissues in pig fetuses
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This paper presents the results of the development of lymphatic and haemopoietic organs in pig fetuses of various ages. The thymus appears to be the first lymphatic organ in these fetuses as well as in other animal species so far studied. On the 77th day the thymus is fully morphologically developed. The accumulations of lymphocytes in the spleen appear on the 70th day. The development of periarteriolar formations takes place around the 84th day of gestation. Further development of lymphoid tissue in the lymph nodes, tongue (tonsilla lingualis) and intenstine is described. Lymphatic follicles were observed both in the tongue and the small intestine on the 77th day. The dynamics of haemopoietic activity in the liver and bone marrow is characterized. The germinal centers in lymphoid folicles were never observed as well as cells of the plasmatic series.
KeywordsGerminal Center Reticular Cell Gestation Period Lymphatic Follicle Postnatal Ontogeny
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- Miller, J. F. A. P.:Immunity in the foetus and the new-born. Brit. Med. Bul. 22: 21, 1966.Google Scholar
- Movat, H. Z., van Erkel, G. A., Fernando, N. V. P.:The lymphoid tissue in the spleen and thymus in newborn and fetal rabbits. Federation Proc. 22: 600, 1963.Google Scholar
- Šterzl, J., Silverstein, A. M.:Developmental aspects of immunity. In: Advances in Immunology, Vol. 6: 337, 1967.Google Scholar