Answer:
The correct answer is mesoderm.
Explanation:
A germ layer is a layer of cells that forms during embryo development. In triploblastic animals, there are three layers. Mesoderm between ectoderm and endoderm two layers, forming triploblastic. Germ layers give rise to all tissues and organs by the process of organogenesis.
Mesoderm give rise to muscles, cartilage, bone, heart, connective tissue, adipose tissue, lymphatic system, circulatory system, dermis, genitourinary system, notochord, and serous membranes.
Thus, the correct answer is mesoderm.
Muscle, cartilage, bone, and heart all develop from the mesoderm layer of the blastocyst.
Further Explanation
A germ layer is a layer of cells that forms during embryonic development. It is primarily a group of cells in the embryo that connect with each other as the embryo are formed and take part in the formation of all tissues and organs.
Animal forms two or three gem layers. The germ layer formed early in the embryonic life and the process through which they are formed is called gastrulation. When gastrulation takes place, a cluster of cells known as blastula, transform into two primary gems layer. These two primary gems layer are called inner layer and outer layer.
The inner layer is also called endoderm and the outer layer called ectoderm. However, there are two primary germ layers that diploblastic organism has. Diploblastic organism has multiple symmetrical body axes such as anemones and jellyfish
All other animals which are triploblastic, as endoderm and ectoderm transformed to produce a third germ layer called mesoderm. All the three germs layer combined will give rise to every organ and tissue in the body from hair to digestive tract.
Although among species, gastrulation differs, but the process remains the same.
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