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A blastula is a stage in the development of an embryo that consists of a?
A layer of cells and a cavity .
The basal cell layer contains special cells called?
The basal cell layer contains special cells called:
Closely packed layer of tall cells containing many chloroplasts?
The layer is called the palisade layer
The layer of the embryo gives rise to the tissues of the nervous system by?
by the ectoderm layer
What is the epidermal layer that produces new cells?
Stratum germinativum, also called stratum basale or basal cell layer.
What is a blastosphere?
A blastosphere is another term for a blastula, an early form in the development of an embryo, consisting of a spherical layer of cells filled with fluid.
The blastula is a solid ball of cells?
A blastula is an early form in the development of an embryo, consisting of a spherical layer of cells filled with fluid.
What membranes form a protective sac that surrounds an embryo?
trophoblast cells i.e the outer cells of blastocyst(1st embryonic stage in man) gives rise to amnion chorion allantois and yolk sac the 4 protective layer of embryo and inner cells called embryoblast gives rise to embryo
A blastula is a stage in the development of an embryo that consists of a?
A layer of cells and a cavity .
Describe the composition of a blastula?
A Blastula is the usually spherical structure produced by cleavage of a zygote, consisting of a single layer of cells (blastoderm) surrounding a fluid-filled cavity (blastocoele). It is the early form of an animal embryo that develops from a morula. It is also called a blastosphere.
What is the early embryo of vertibrate animals?
A fertilised egg is first known as a zygote which comes from a Greek word and means 'to join' After the first mitosis division occurs the number of cells begin to increase rapidly producing a cluster of cells called morula in a protective layer called the zona pellucida. The rapid cell division is known as cleavage. When there is 16 cells, the outer most cells flatten against the zona pellucida and a cavity appears in the core. The inner cells will develop into the body of the embryo. This stage is known as embryogenesis. All this happens in the first two weeks In dogs implantation occurs 14-30 days after fertilisation and in cats 11-16 days. By the forth week the embryo is known as a foetus
The basal cell layer contains special cells called?
The basal cell layer contains special cells called:
Where do veins come from?
The thick layer of a vein is made of collagen, wrapped in bands of smooth muscle while the interior is lined with endothelial cells called intima.
What The inner layer of cells is the .?
The inner layer of a cell is called the endoderm.
In what order a needle pierce the epidermal layers of forearm?
A needle would pierce the skin from the outside inward: A layer of flat cells called as Stratum corneum, then a layer of almost transparent cells called Stratum Lucidium, then a layer of cells which look granular and is called the Stratum granulosum, next is a layer of cells called the Stratum Spinosum and lastly, a single cell layer with a prominent nucleus in each cell called the Stratum basale (the growing layer).
What marks the beginning of germs layer development in an embryo?
Gastrulation marks the beginning of germ layer development in an embryo.
Are seed made of cells?
Seeds are comprised of an embryo and an extra layer of sporophyte tissue which hardens to produce the seed coat, so in a sense, yes seeds are made up of cells because the embryo is produced by the fertilization of plant gametes to form a zygote.
