Question

Human heart is _____ in origin.
A) Human heart is mesodermal in origin
B) Human heart is ectodermal in origin
C) Human heart is endodermal in origin
D) Human heart is both ectodermal and mesodermal in origin

Answer 1

Hint: During the gastrulation process, as the hollow ball of cells which forms the blastula starts to divide into more specialized cells that are layered around the growing embryo, the germ layers develop.

Complete answer:
First we should know about the human heart to answer this question. The human heart is a muscular organ which, via the circulatory system, pumps blood across the body, provides tissue with nutrients and oxygen, and eliminates carbon dioxide as well as other waste.

Now, let us find the solution from the options-
> Mesoderm is the embryo’s main germ layer residing under the other two germ layers, ectoderm and endoderm, respectively. Both connective tissues originate from it. The lateral plate of its mesodermal layer leads to the nucleus, the circulatory system's blood cells and blood vessels.
> In the very early embryo, the ectoderm is now the most external of the three primary germ layers created. The mesoderm, and endoderm are the remaining two layers. It arises and originates from the outermost surface of germ cells. Thus, option B is not the correct option.
> Each of the three main germ layers of the very early embryo is the endoderm. The ectoderm and mesoderm are the remaining two layers, with the inner layer being the endoderm. The inner surface of the gastrula, which grows into the endoderm, is formed by cells migrating inwards across the archenteron. Thus, option C is not the correct option.

Thus, the correct option is option (A) Human heart is mesodermal in origin.

Note: The mesoderm makes it possible for more fully formed species to provide an interior cavity of the body that contains and covers tissues, bathes them in fluids and surrounds them with connective tissue.