Term of the Day

Mesenchyme (Mesenchymal Tissue): In embryology, the first true tissue formed from the mesoderm germ layer. It is a type of connective tissue composed of star-shaped mesenchymal cells surrounded by a matrix of fluid ground substance containing fine fibers. Mesenchyme eventually differentiates into all other connective tissues.

Term of the Day

Rhombencephalon: In embryology, one of the three primary brain vesicles. Also known as the hindbrain, it gives rise to the metencephalon and myelencephalon (secondary brain vesicles), and ultimately to the pons, cerebellum, and medulla oblongata.

Term of The Day

Hemoglobin F: Unique type of hemoglobin formed during fetal development. It has a higher affinity for oxygen than adult hemoglobin and is made of 2 alpha and 2 gamma polypeptide chains, rather than the 2 alpha and 2 beta chains of adult hemoglobin. After birth, erythrocytes carrying Hemoglobin F are destroyed by the baby's liver and are replaced by erythrocytes carrying hemoglobin A.