Question

Which of the following are derivatives of endoderm?
a. Muscle and blood
b. Alimentary canal and respiratory organ
c. Excretory and reproductive organ
d. Skin and Nerve cord

Answer 1

Endoderm is one of the three essential germ layers in the early incipient organism. The other two layers are the ectoderm (outside layer) and mesoderm (center layer), with the endoderm being the deepest layer. Cells relocating internal along the archenteron structure the inward layer of the gastrula, which forms into the endoderm.

Complete answer:
- From the three germ layers, various organs are shaped.
- Blood and muscles are shaped by the mesoderm as are the excretory and the regenerative frameworks.
- The regenerative organs are created from the moderate mesoderm.
- Ectoderm is that layer which shapes the skin and the whole sensory system including the nerve rope.
- The ectoderm is a germ layer, or tissue layer, that structures in a creature undeveloped organism during improvement
- Endoderm shapes the Excretory and the respiratory organs.
- Endoderm is one of the three essential germ layers in the early incipient organism.
- The other two layers are the ectoderm (outside layer) and mesoderm (center layer), with the endoderm being the deepest layer.
- Cells moving internal along the archenteron structure the inward layer of the gastrula, which forms into the endoderm.

Hence, the correct answer is option (B).

Additional information:
Gastrulation is the cycle where the three germ layers (ectoderm, mesoderm and endoderm) are framed by progressive floods of epiblast cells relocating through the crude streak. Development of the crude streak on day 15, denotes the main occasion of gastrulation.

Note: The underlying rush of relocating cells (day 16) streams through the crude streak, dislodging the hypoblast cells to become authoritative endoderm, which eventually creates the future gut subordinates and gut linings.