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What blastocyst produce the primordial germ cell?
Gastrula (early gastrula follow the blastula in the development sequence) ~ As a result of gastrulation, a three-layered embryo forms, each layer corresponding to a primary germ layer from which all body tissues develop.
Which of these has cell layers that will later develop into different body structures?
Gastrula has cell layers that will later develop into different body structures. The three primary germ layers - ectoderm, mesoderm, and endoderm - are formed during gastrulation and give rise to various tissues and organs in the developing embryo.
What marks the beginning of germ development in an embryo?
The beginning of germ development in an embryo is marked by the formation of primordial germ cells through a process called germ cell specification. These cells are the precursors to sperm and egg cells and are essential for sexual reproduction. Germ cell specification typically occurs during early embryonic development.
What is a spermatid?
A spermatid is a haploid male germ cell that arises from meiosis and eventually matures into a sperm cell. It has a single set of chromosomes and goes through a process called spermiogenesis to grow a tail and develop other structures needed for fertilization.
What is the difference between the spermatids and the spermatozoa?
Spermatid is an immature sperm cell where a spermatoza is a mature sperm cell.
What are choriocarcinomas the result of?
Choriocarcinomas result from genetic damage to a germ cell. Males with Klinefelter syndrome are especially likely to develop extragonadal germ cell tumors.
What is a germ cell tumor?
Germ cell tumors are malignant (cancerous) or non-malignant (benign, non-cancerous) tumors that are comprised mostly of germ cells. Germ cells are the cells that develop in the embryo (fetus, or unborn baby) and become the cells that make up the reproductive system in males and females. These germ cells follow a midline path through the body after development and descend into the pelvis as ovarian cells or into the scrotal sac as testicular cells. Most ovarian tumors and testicular tumors are of germ cell origin. The ovaries and testes are called gonads. They are rare, as only about 2.4 children in one million will develop one of these tumors in a given year. Germ cell tumors account for 4 percent of all cancers in children and adolescents under the age of 20 years. Germ cell tumors can spread (metastasize) to other parts of the body. The most common sites for metastasis are the lungs, liver, lymph nodes, and central nervous system. Rarely, germ cell tumors can spread to the bone, bone marrow, and other organs. Embryonal carcinoma cells are malignant cells that are usually mixed with other types of germ cell tumors. They occur most often in the testes. These types of cells have the ability to spread to other parts of the body. When these cells are mixed with an otherwise benign type of tumor (mature teratoma), the presence of embryonal carcinoma cells will cause it to become malignant (cancerous).
What is a mixed germ cell tumor?
Germ cell tumors are malignant (cancerous) or non-malignant (benign, non-cancerous) tumors that are comprised mostly of germ cells. Germ cells are the cells that develop in the embryo (fetus, or unborn baby) and become the cells that make up the reproductive system in males and females. These germ cells follow a midline path through the body after development and descend into the pelvis as ovarian cells or into the scrotal sac as testicular cells. Most ovarian tumors and testicular tumors are of germ cell origin. The ovaries and testes are called gonads. They are rare, as only about 2.4 children in one million will develop one of these tumors in a given year. Germ cell tumors account for 4 percent of all cancers in children and adolescents under the age of 20 years. Germ cell tumors can spread (metastasize) to other parts of the body. The most common sites for metastasis are the lungs, liver, lymph nodes, and central nervous system. Rarely, germ cell tumors can spread to the bone, bone marrow, and other organs. Embryonal carcinoma cells are malignant cells that are usually mixed with other types of germ cell tumors. They occur most often in the testes. These types of cells have the ability to spread to other parts of the body. When these cells are mixed with an otherwise benign type of tumor (mature teratoma), the presence of embryonal carcinoma cells will cause it to become malignant (cancerous).
What is the medical term meaning germ cell from which blood vessels develop?
Angioblast
What type of tumors can develop in the parotid gland?
Among the tumors seen in the parotid gland are lymphoma, melanoma, and squamous cell carcinoma.
Most common type of testicular cancer in males over 15 and under 40?
Most cases (95 percent) of testicular cancer originate in undeveloped cells (germ cells) that produce sperm.These tumors, called germ cell tumors (GCTs), are most common in men between the ages of 20 and 40 and are curable more than 95 percent of the time. There are two main types of GCTs: seminomas and nonseminomas. A third type, called stromal tumors, develops in the supporting tissues of the testicle.Testicular cancer may also develop in the supportive, hormone-producing tissue of the testicles (stroma). This type accounts for 4 percent of testicular cancer in men and 20 percent of cases in boys.Types of stromal tumors include Leydig cell tumors and Sertoli cell tumors.
What is the opposite of a male germ cell?
The opposite of a male germ cell is a female germ cell, which is known as an egg or ovum. Male germ cells are called sperm.
Whick part of a hen's egg is the germ cell?
The germ cell in a hen's egg is the ovum, which is found in the egg yolk. The ovum is the female reproductive cell that, when fertilized by a sperm cell, can develop into a new organism.
Where do most osteochondromas occur?
Giant cell tumors generally develop in a section of the thigh bone near the knee
What is the medical term meaning germ or sex cell?
A gamete is the same thing as the sperm and the egg. It comes from the Greek word meaning spouse. When the two gametes get together, they form a zygote, which will develop into a new individual.
What is the medical term for germ or sex cell?
The medical term for a germ cell is "gamete," and for a sex cell is "germ cell."
Where do ovarian cancers develop?
Ninety percent of all ovarian cancers develop in the cells lining the surface, or epithelium, of the ovaries and so are called epithelial cell tumors.
