In the early development of the human embryo, the epiblast which is the outer layer found in the embryo, it will eventually form the different germ layers which are called the ectoderm, the outer layer, the mesoderm that is in the middle layer and last, the endoderm which is found in the inner layer.
<span>During the early development of a human embryo, the epiblast eventually forms the ectodermal, mesodermal, and endodermal tissues. Epiblast is a part of the inner mass cell whose primary function is to create these three types of tissues for the human embryo. Ectoderm is the most exterior layer of germ, mesoderm is the middle layer, and endoderm is the most proximal layer. </span>
Tetanus is not possible in cardiac muscle tissue because cardiac cells have longer action potentials and a very long refractory period compared to other cells. This helps prevent the heart from cramping and seizing up.
