Question

Write few lines about the development of human embryo

Answer 1

Human embryonic development, or human embryogenesis, refers to the development and formation of the human embryo. It is characterised by the process of cell divisionand cellular differentiation of the embryo that occurs during the early stages of development. In biological terms, the development of the human body entails growth from a one-celled zygote to an adult human being. Fertilisation occurs when the sperm cell successfully enters and fuses with an egg cell (ovum). The genetic material of the sperm and egg then combine to form a single cell called a zygote and the germinal stage of development commences.[1]Embryonic development in the human, covers the first eight weeks of development; at the beginning of the ninth week the embryo is termed a fetus. Human embryology is the study of this development during the first eight weeks after fertilisation. The normal period of gestation (pregnancy) is nine months or 38 weeks.

Answer 2

Write few lines about the development of human embryo

ANS ; The term embryo applies to the earliest form of life, produced when an egg (female reproductive cell) is fertilized by a sperm (male reproductive cell; semen). The fertilized egg is called a zygote. Shortly after fertilization, the zygote begins to grow and develop. It divides to form two cells, then four, then eight, and so on. As the zygote and its daughter cells divide, they start to become specialized, meaning they begin to take on characteristic structures and functions that will be needed in the adult plant or animal.

An embryo is a living organism, like a full-grown rose bush, frog, or human. It has the same needs—food, oxygen, warmth, and protection—that the adult organism has. These needs are provided for in a variety of ways by different kinds of organisms.

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