Embryology

Um, I think it is...Cartilage?

The embryonic sac, or amniotic sac, is composed of a membrane called the amnion. The amnion serves to protect the embryo by providing a physical barrier against external threats and a cushioned environment for development. Additionally, the amnion secretes amniotic fluid which helps to regulate temperature, provide buoyancy, and prevent desiccation of the embryo.

cellular differentiation

Cell location within a developing embryo is critical for determining cell fate and differentiation. Signals from neighboring cells and the surrounding environment influence the development of cells in specific locations, leading to the formation of different tissues and organs. Cell positioning is essential for proper spatial organization and patterning during embryonic development.

By turning on genes in the section of the embryo. For instance, in D. Melanogaster the head, thorax and abdomen all contain genes that give rise to brains, mouth and proboscis in the head region Wings in the thorax and legs there to. Spicules in the abdomen. Two sets of HOX genes control all this activity and are actually lined up linearly along the route of gene activity

The type of cell division that occurs in the early embryo is called mitosis. Mitosis is a process where a single cell divides into two identical daughter cells, allowing for growth and development of the embryo.

It will begin to divide and divide becoming an embryo. It begins with one cell and continues until it is millions of cells and these will be seen:scalp vascular plexus, eyelid, eye, nose, auricle of external ear, mouth, shoulder, arm, elbow, wrist, toes separated, sole of foot and umbilical cord.

It is called an embryo until about eight weeks after fertilization. After this development is considered fetal for the remainder of the pregnancy.

Whether an embryo is considered "alive" can depend on the definition of life being used. From a scientific standpoint, an embryo is a developing organism with the potential to grow into a living being. It contains the necessary genetic material and cellular processes to support its growth and development.

"Gastropore" is a more correct term because it refers to the pore in the gastrocoel region of a developing embryo, where digestion will eventually take place in organisms like gastropods. "Blastopore," on the other hand, refers to the opening of the central cavity of an embryo such as in the gastrulation stage of development in animals like amphibians. The term "gastropore" is more specific in its reference to the digestive system.

An embryo is the term used to describe a developing organism in its early stages of growth and development.

During development, an embryo is embedded in the the endometrium during the first week of pregnancy.

The endometrium is the innermost muccous membrage of the uterus. The embryo becomes implanted in it, then the surrounding tissue forms sinuses that exchange nutrients and later becomes the placenta.

This reflects the property of life known as growth and development, which refers to the ability of organisms to increase in complexity and size over time through a series of stages or processes. In the case of the kernel of corn, the embryo plant has the potential to develop into a complex plant with various structures and functions.

An amniotic sac is a fluid-filled sac that surrounds and protects the embryo during development in utero. It helps provide a cushion against physical impact and keeps a stable environment for the embryo to grow.

Embryos develop externally through a process called embryogenesis. This involves the growth and differentiation of cells into specialized tissues and organs. The embryo receives nutrients and support from the environment through structures like egg membranes or placenta, depending on the species.

Male embryos have XY chromosomes, while female embryos have XX chromosomes. This genetic difference determines the development of male or female reproductive organs. Hormonal differences also play a role in shaping the physical characteristics of male and female embryos.

The uterine membrane, comprised of the placenta, facilitates the exchange of nutrients, oxygen, and waste products between the mother and embryo. This transport occurs through diffusion, active transport, and facilitated diffusion mechanisms. The placenta also acts as a barrier to prevent harmful substances from crossing between the maternal and fetal circulations.

The developmental stages of an embryo include the pre-embryonic stage (fertilization to week 2), embryonic stage (weeks 3-8), and fetal stage (week 9 to birth). During the embryonic stage, major organs and structures begin to form, while during the fetal stage, these structures continue to grow and develop in preparation for birth.

Fruit Flies and frog eggs are long-time,well characterized standbys in the lab environment,and specific manipulations allow researches to introduce genes from other organisms into these species

The embryo in a seed is the precursor to a new plant and contains the genetic material needed for growth and development. It is responsible for germination, where it sprouts and forms the roots, stem, and leaves of the new plant.

Well, embryo is the developing stage of a zygote(fertilised egg) when it repeatedly

divides itself into a ball of cells to form the different tissues and then the organs of the baby. The stage when the hands, legs , and different body parts of the baby can be identified is termed as the foetus.

So, in accordance with your question the stage of the foetus is more developed. However the foetus is not the fully developed stage.

The foetus once completely developed , the baby is born.

The tissue formed once mitosis of an OVUM

A few days after fertilization. apex:)

An embryo typically develops into a fetus around 8 weeks after fertilization. At this point, the major organs have begun to form and the fetus starts to resemble a human.

Developing embryos require a stable environment with proper nutrients, oxygen, and temperature. They also need protection from harmful substances and proper genetic programming for healthy development. Additionally, they rely on the mother's body for support in terms of shelter and nourishment.

During the first mitotic division, the zygote undergoes cytokinesis, dividing into two cells, known as blastomeres, which make up the two-celled embryo. This marks the beginning of embryonic development. Each blastomere contains identical genetic information from the original zygote.

An embryo is not always stimulated to develop into a female. The presence of the Y chromosome leads to the development of a male embryo through the expression of genes that promote male characteristics. In the absence of the Y chromosome, the default pathway is for the embryo to develop into a female.