Give two differences between blastula and gastrul.
Answers
Explanation:
The main difference between blastula and gastrula is in the structure and components of each of the embryonic stages. ... Gastrula develops from the blastula in a process called gastrulation. Massive movements of cell masses in the blastula develop the three primary germ layers: endoderm, ectoderm, and mesoderm
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Answer:
Blastula
The blastula is the first important stage following fertilization, playing a very important role in organism development. It is a spherical and hollow structure, that is one cell thick and is formed through a process known as blastulation. Both meroblatic and holoblastic cleavages can give rise to the blastula. The cavity found within the blastula is known as the blastocoel, with its outer single-celled layer called the blastoderm.
A continued blastula development eventually results in the gastrula. The process of conversion of a blastula into a gastrula is known as ‘gastrulation’, which is then proceeded by organogenesis.
The gastrula is comprised of three germ layers, each of which ultimately give rise to organs in the late embryo. The three germ layers are the ectoderm, mesoderm and the endoderm. The outermost layer is the ectoderm, which later differentiates into the brain, spinal cord, skin and the nerves of the embryo. The middle layer, the mesoderm, forms connective tissues, muscles, cartilage, reproductive organs, bones, the skin dermis and teeth dentine. The innermost layer, the endoderm, differentiates into the basic primitive gut.
Explanation:
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