Which germ layer of a blastocyst gives rise to muscle and connective tissues?

Q: After fertilization the blastocyst develops three germ layers. Which germ layer is the innermost…

A: In the human embryo , after about three days of fertilisation,the zygote forms a solid mass of cells…

Q: What is myometrium?

A: The uterus is an inverted pear-shaped muscular pouch which is a part of female reproductive system.…

Q: What are the major features of embryonic development at various months of pregnancy?

A: Within twenty hours after the fertilization, the zygote starts to divide rapidly into many cells.…

Q: What happens to placenta after the birth of the baby?

A: The process of physical expulsion of the fetus and placenta from the uterus is called labor or…

Q: Which structures develop from the neural tube and somites?

A: the structures that  develop from the neural tube and somites are :

Q: What is the main stimulus for the secretory phase of the endometrium?

A: Endometrium is the inner lining of uterus made of columnar epithelial cells. Its part of female…

Q: What is the histological difference between a morula and a blastocyst?

A: Introduction  Life starts from single cell called Zygote. Zygote is the single diploid cell resulted…

Q: What are some examples of genetic conditions and teratogens thatcause birth defects?

A: The term genetic refers to the genome present in the cells of an organism. Genome is the complete…

Q: How is the yolk sac formed?What is the function of theyolk sac?

A: Yolk sac is the membranous sac attached to the embryo. It is also known as umbilical vesicle.

Q: What impact does the growth of the uterus during pregnancy have on other organs of the abdomen?

A: During pregnancy, the uterus grows slowly as the fetus grows and develops. The upper part of the…

Q: Which structures in males are homologous to the ovaries, the clitoris, the paraurethral glands, and…

A: The testes are homologous to the ovaries;

Q: How is a fetus usually positioned in the uterus as birth nears?

A: Answer: Introduction: The place of the baby in the uterus is known as the presentation of the fetus.…

Q: Where does fertilizationusually occur, and what hormonal changeshappen after fertilization?

A: Fusion of sperm with ovum is known as fertilisation Fertilisation generally occurs in fallopian tube…

Q: What are the endocrinefunctions of the placenta?

A: The placenta is a large organ that develops during pregnancy. It is usually attached to the uterine…

Q: What are the main functions of each of the extraembryonic membranes?

A: Foetal membranes are called extraembryonic membrane because they are not a part of the body of the…

Q: What are the three phases of the menopause?

A: Menopause is that the transition period during a woman's life once her ovaries stop producing eggs,…

Q: To which structures do the mesovarium, ovarian ligament, and suspensory ligament anchor the ovary?

A: The female gonad that lies in pair along either side of the uterus in the female body's pelvic…

Q: Name the three germ layers, and identify several types of structures thatarise from each.

A: Ans: Germ layers: The layers which are formed during the early stage of embryonic development are…

Q: How does a morula differ from a blastocyst?

A: Morula Vs Blastocyst:         Morula stay distinct from a blastocyst, in which a morula (3-4 days…

Q: Describe the formation and functions of the placenta?

A: The human placenta is allanto-chorial (the chorial placental circulation is connected with the…

Q: How do the amount and distribution of yolk influence gastrulation?

A: Gastrulation is a process in which the single layer of cells called blastula is arranged into a…

Q: Which part of a sperm cell contains enzymes that help the sperm cell fertilize a secondary oocyte?

A: Fertilization is the process of fusion of male and female gametes that result in the formation of a…

Q: Which gene is responsible for the development of the gonads into testes?

A: Introduction Chromosomes are classified into two types: Autosomes and Allosomes/Sex chromosomes. The…

Q: How do sustentacular cells support developing sperm?

A: In the male reproductive system, spermatogenesis takes place in the seminiferous tubules. One to…

Q: What cells of the blastocyst invade the endometrium?

A: Blastocyst is a 70-100 cell structure that gets implanted in the uterus. It is composed of two types…

Q: Name two types of cells in the testis other than the germ cells, and describe their locations and…

A: Ans: Testis: It is the male reproductive gonad or glands which is involved in the production of the…

Q: What are the structural changes that occur in the uterus over the course of the menstrual cycle and…

A: The menstrual cycle is a sequence of natural modifications in hormone manufacturing and the systems…

Q: What occurs during cleavage?

A: Fertilization is the fusion of  ovum and sperm so as to form a diploid zygote. Zygote is the first…

Q: What happens in the menopause?

A: The menstrual cycle is a sequence of changes in the structures of the uterus and ovaries and hormone…

Q: What hormones does the placenta produce?

A: The placenta is a flattened circular organ in the uterus of pregnant mammals, which nourishes and…

Q: What is the first hormone secreted that prevents a menstrual cycle, thereby blocking removal of an…

A: The eggs which are released by ovulation by the ovaries are funelled into the fallopian tubes by…

Q: What type of cells surround the oocyte in a unilaminar follicle?

A: oocyte present in a unilaminar follicles. oocytes is an cell present in the ovary which form ovum…

Q: What is oogenesis? Give a brief account of oogenesis.

A: The female reproductive organs comprise primary sex organs (ovaries) as well as accessory sex…

Q: What is the advantage of cephalization?

A: Cephalization is an evolutionary process of concentrating the nervous tissues, sense organs and…

Q: What would happen if human chorionic gonadotropin levels did not rise adequately during pregnancy?

A: Hormones are chemical messengers secreted by the glands present in the body. They are responsible…

Q: What happens during the secretory phase of the endometrium?

A: The uterine cycle represents the cyclic changes that occur inside the uterus of a female.

Q: What is the connective tissue capsule surrounding each testis called?

A: Connective tissue is one of the four basic types of tissues found in animal that provides structural…

Q: What are the factors affecting the timing of PUBERTY?

A: Puberty is a state that occurs during the start of adolescence period around the age 12 to 15. It is…

Q: Name the layer of cells that forms the outer wall of blastocyst.

A: Blastocyst is a developmental stage of the the embryo to form an foetus. This developmental form is…

Q: When does implantation of the blastocyst usually take place?

A: During fertilization, a sperm comes in contact with the zona pellucida layer of the ovum and induces…

Q: Which hormone is correlated with the thickening of the endometrium?

A: Ovary is the primary female reproductive organ which is responsible for the production of female…

Q: What is the difference between the anterior and posterior determinant for the oocyte?

A: The difference in the anterior and posterior parts of an embryo is due to the difference between the…

Q: What is the developmental fate of the inner cell mass of the blastocyst?

A: A diploid zygote is formed by the union of a haploid egg cell and a haploid sperm cell. The zygote…

Q: What is the main stimulus for the proliferative phase of the endometrium?

A: The changes during a menstrual cycle can be divided into three phases: i.) Proliferative phase ii.)…

Q: How is the Placenta as an Important Lifeline between Mother and Baby?

A: During pregnancy, an organ termed the placenta forms in the uterus. Several variables can impact the…

Q: What is oogenesis?

A: An female’s internal reproductive organs are uterus, vagina, fallopian tubes, cervix, and ovary. The…

Q: Where does fertilization usually occur?

A: Sexual reproduction is a type of reproduction, which involves a complex life cycle in which a…

Q: what are the principal structures each germ layer gives rise to in the adult?

A: The zygote is a cell formed by the union sex cell of the male (sperm) and sex cell of the female…