|subheading1text = <center>[[Appendix - Anatomy & Physiology|Appendix]], [[Bone Marrow - Anatomy & Physiology|bone marrow]], [[Bursa of Fabricius - Anatomy & Physiology|bursa of Fabricius]], [[Haematopoiesis - Overview#Hepatic Phase|foetal liver]], [[Peyer's Patches - Anatomy & Physiology|ileal Peyer's patch]] and [[Thymus - Anatomy & Physiology|thymus]]. </center> | |subheading1text = <center>[[Appendix - Anatomy & Physiology|Appendix]], [[Bone Marrow - Anatomy & Physiology|bone marrow]], [[Bursa of Fabricius - Anatomy & Physiology|bursa of Fabricius]], [[Haematopoiesis - Overview#Hepatic Phase|foetal liver]], [[Peyer's Patches - Anatomy & Physiology|ileal Peyer's patch]] and [[Thymus - Anatomy & Physiology|thymus]]. </center> |