The middle tissue developed in the gastrula stage of the embryo lying between the ectoderm and the endoderm.
The middle layer of an embryo, which develops into muscles, bones, blood, kidneys, cartilages, urinary ducts and the cardiovascular and lymphatic systems.
In the embryo, middle germ cell layer from which muscle, bone, cartilage, blood, vascular and lymph tissue, and other tissues develop. (The other two cell layers are the inner endoderm and the outer ectoderm.)
The middle germ layer of the early embryo. It gives rise to cartilage, muscle, bone, blood, kidneys, gonads and their ducts, and connective tissue. It separates into two layers, an outer somatic and an inner splanchnic mesoderm, separated by a cavity (coelom) that becomes the body cavity. The dorsal somatic mesoderm becomes segmented into a number of somites.
The middle layer of the three germ layers of the embryo during its early development. It develops into cartilage, bone, blood, muscle, kidneys, testes and connective tissue.
A primary germ layer of the embryo lying between ectoderm and endoderm. From it arise all connective tissues; muscular, skeletal, circulatory, lymphatic, and urogenital systems; and the linings of the body cavities.
The middle layer among the three primary germinal layers of the embryo is known as the mesoderm. Positioned between the ectoderm and the endoderm, it is responsible for generating various structures such as connective tissue, bone, cartilage, muscle, reproductive organs, urinary organs, the heart, and blood vessels.