Blastula, hollow sphere of cells, or blastomeres, produced during the development of an embryo by repeated cleavage of a fertilized egg. The cells of the blastula form an epithelial (covering) layer, called the blastoderm, enclosing a fluid-filled cavity, the blastocoel.

A blastula (blastocyst in mammals), is a sphere of cells surrounding a fluid-filled cavity called the blastocoel. The blastocoel contains amino acids, proteins, growth factors, sugars, ions and other components which are necessary for cellular differentiation. The blastocoel also allows blastomeres to move during the process of gastrulation. [16]

2024年11月23日 · The rapid, multiple rounds of cell division are termed cleavage. After the cleavage has produced over 100 cells, the embryo is called a blastula. The blastula is usually a spherical layer of cells (the blastoderm) surrounding a …

2023年3月31日 · What is a Blastula in Biology? The blastula is an early embryonic stage that occurs during the development of many animal species. It is characterized by a hollow, spherical structure, with a fluid-filled cavity called the blastocoel.

A blastula is formed after a zygote undergoes cell division, it is a hollow structure that consists of about 6-32 cells. The development of a blastula takes place during the development of an embryo which is done by repeated cleavage of a fertilized egg.

2017年6月15日 · The main difference between morula and blastula is that morula is a spherical mass of blastomeres, which are formed following the splitting of a zygote whereas blastula is an early developmental stage of the embryo, consisting of a spherical layer of cells filled with fluid.

From the classic hollow blastula of vertebrates to the syncytial blastula of insects, each morphology reflects unique reproductive strategies and ecological constraints. By elucidating the developmental variations and evolutionary significance of blastulae, we gain insights into the fundamental principles governing embryogenesis and the ...

2022年11月30日 · The blastula (from Greek βλαστός (blastos), meaning "sprout") is a hollow sphere of cells, referred to as blastomeres, surrounding an inner fluid-filled cavity called the blastocoel formed during an early stage of embryonic development in animals.

2019年3月6日 · Blastula refers to an animal embryo at the early stage of development when it is a hollow ball of cells whereas blastocyst refers to mammalian blastula in which some differentiation of cells has occurred.

3 天之前 · (Greek, blastos = sprout + cystos = cavity) or blastula, the term used to describe the hollow cellular mass that forms in early development. The blastocyst consists of cells forming an outer trophectoderm (TE, trophoblast) layer, an inner cell mass (ICM, embryo blast) and a blastocoel (fluid-filled cavity). The inner cell mass will form the ...