The surface that enables active and passive exchange between the fetal and maternal bloodstreams is the (a) yolk stalk. (b) chorionic villi. (c) umbilical veins. (d) umbilical arteries.

Q: What is the ovum doing during the primary oocyte stage?

A:

Q: Identify the extraembryonic membranes and provide afunction for each.

A: Extraembryonic membranes are the membranes that assist in the development of embryo. They are…

Q: List the four primary tissue types of the adult body and identify which of the three primary germ…

A: A tissue is defined as a group of cells which are having a similar structure and are organized to…

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: Give the origins and functions of the chorion, amnion, allantois, and yolk sac.

A: The extraembryonic membrane can be defined as the type of membrane which helps in the development of…

Q: What are the major events that occur from fertilized egg to birth?

A: Fertilization is the process of fusion of the male gamete (sperm) with the female gamete (ovum) to…

Q: List the functions of the placenta?

A: Step 1 The placenta is the fetomaternal connective that develops during pregnancy and forms a…

Q: What happens if the fallopian tubes are partially blocked and the ovulated eggs are prevented from…

A: The fallopian tubes are two thin tubes located on each side of the uterus. It is the site of…

Q: What is the differencebetween amnion and chorion?

A: Both amnion and chorion are present during a woman’s pregnancy and are part of the extra embryonic…

Q: State the functions of the placenta, amnion, chorion, yolk sac, and allantois?

A: The placenta is developed during pregnancy in the uterus. It provides oxygen and nutrients to the…

Q: What is yolk? What is its role in fertilization and development?

A: The development of organisms depends on the supply of resources. In embryo development nutrition of…

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: Which structure provides for exchange of materials between mother and fetus?

A: The female reproductive system is defined as a system composed of the internal and external sex…

Q: What causes the newborn to take its first breath immediately after birth?

A: The amount of CO2 accumulated in the baby body caused acidosis

Q: What route would oxygen in the mother’s blood follow to arrive at abody cell of the fetus?

A: In order to transport the oxygen to the fetus from the mother to the fetus the structure called…

Q: How does the oocyte nucleus move during oogenesis?

A: Oogenesis: Otherwise called as ovogenesis. This is a process that happens during the embryonic…

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 structure connects the embryo to the placenta?

A: Umbilical cord

Q: What is the function of the placenta?

A: Placenta is formed after implantation of the embryo has occurred on the uterine wall. It is a…

Q: Name the structure that connects the placenta with the foetus.

A: Placenta is formed after implantation of the embryo has occurred on the uterine wall. It is the…

Q: What determines whether an embryo will develop into a male or a female?

A: The process of fertilization is the union of male and female gametes. It results in the formation of…

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: Distinguish between a newborn and an infant.

A: Though the words "newborn" and "infant" are often used interchangeably, the precise meaning must be…

Q: How is an egg (oocyte) prepared during oogenesis for fertilization? Why is preparation essential to…

A: Oogenesis is defined as the process by which the female sex cells or ova or egg cells are produced.…

Q: What is the significance of gastrulation?

A: Gastrulation is the embryonic stage in which all the germinal layers are being developed. It is a…

Q: "What is the advantage of internal fertilization over external fertilization and vice versa"?

A: The natural cycle by which new individual creatures – "offspring" – are delivered from their…

Q: What are the three germ layers formed during gastrulation?

A: Developmental Biology is the field of biology that studies the processes by which multicellular…

Q: How does the fertilized egg give rise to the adult body?

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

Q: How is the yolk formed?

A: Cells are the basic structural and functional units of life. These are the building blocks that make…

Q: What are the Vital Sign ranges of the normal newborn?

A: KEY WORDS :- Newborn - When baby is around 2 or 3 days old.

Q: Why does an infant have to gain weight in the first six months?

A: Healthy infants generally vary in the form of sizes. In any case, baby development will be normal…

Q: What is the difference between neonatal and prenatal?

A: The firsts eight weeks after fertilization are termed as embryonic stage in which formation of…

Q: Why is fetal Hb essential for the survival of placental animals?

A: Hemoglobin is an oxygen transport protein in mammals. It is made up of four sub-units. Adult…

Q: What is the advantage of internal fertilization over external fertilization and vice versa?

A: Question - What is the advantage of internal fertilization over external fertilization and vice…

Q: What is the technical term for the fertilized egg?

A: The process of fusion of gametes from male and female parents is called fertilization. The sperm is…

Q: Describe the structure and functions of the four extraembryonic membranes

A: The layers inside the egg around the embryo are called extraembryonic membranes, and they nourish…

Q: What would happen if a blastocyst implanted into the functional layer of the endometrium and a…

A: It is at the blastocyst stage of development that an embryo would normally move out of the fallopian…

Q: Seeing that the placenta acts as a barrier protecting the baby from harmful substances the mother…

A: Placenta is the ultimate connection between mother and the foetus.All the nutrients and other…

Q: What tissues and organs arise from the three germ layers in embryonic development?

A: In developmental biology, various stages are involved for the development of a foetus. Gastrulation…

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

A: The mesoderm give rise to muscle ,connective tissue , lymphatic system bones,circulatory system,etc.

Q: What determines if a baby is a boy or a girl and how does the child reproductively mature?

A: The phenotype (trait) of an organism is determined by the genotype (alleles) of an organism. At the…

Q: what is amniocentesis?

A: Prenatal genetic tests are conducted before the birth to detect any genetic disorder. It helps to…

Q: Distinguish between: embryo and a fetus

A: The terms embryo and fetus both refer to the developing baby inside the mother’s womb. The…

Q: During which of the 3 stages of oogenesis does the oocyte nucleus move?

A: Oogenesis- Oogenesis is the process of formation of female gametes. This process begins inside the…

Q: Describe the roles of the four extraembryonic membranes.

A: Introduction :- One of the membranes that aid in the development of the embryo is the extraembryonic…

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…