Embryology

The placenta and lungs both facilitate the exchange of gases - the placenta allows oxygen and nutrients to pass from the mother's blood to the fetus, while removing waste products, similar to how the lungs exchange oxygen and carbon dioxide with the blood. They both play a crucial role in maintaining the health and development of the respective organisms.

The fluid-filled bag of thin tissue that develops around the embryo is called the amniotic sac. It helps protect and cushion the developing embryo/fetus during pregnancy.

The yolk is the part of the egg that provides food for the embryo. It contains essential nutrients such as proteins, fats, and vitamins that support the developing chick inside the egg.

An elite embryo is a high-quality embryo with the best chances of developing into a healthy fetus. These embryos typically have characteristics such as optimal cell division, proper genetic makeup, and the absence of abnormalities, making them more likely to result in a successful pregnancy during in vitro fertilization (IVF) procedures.

Scientists study embryos because they provide insights into how organisms develop and evolve. The features of embryos that support evolution include shared structures across different species, such as gill slits and tails in vertebrates, which suggest common ancestry. Comparing embryos of different species can also reveal similarities in developmental pathways, further supporting evolutionary relationships.

The inner cell mass of the blastocyst will undergo gastrulation and form the embryo. This inner cell mass consists of pluripotent cells that will give rise to the various tissues and organs of the developing embryo.

Actually ur question is itself not correct so the 'WHY" part cannot be answered.

Epithelial tissue is a lining tissue which can be present in any organ.the mesoderm gives rise to organs like-muscles / bones / connective tissue / blood and lymph vessels / kidney / gonads and the cortex of suprarenal glands.

ectoderm-nervous system epidermis and so on and

endodermto GIT liver lungs pancreas and GIT

so for example if u consider the epithelial tissue of lungs----its derived from endodermas lung as a whole is derived from endoderm.

The smallest living thing in the list is a bacteria. Bacteria are single-celled organisms that are smaller than a frog embryo and mitochondria. Viruses are not considered living organisms because they cannot replicate on their own, and an atom is a non-living, indivisible unit of matter.

No, the size of the embryo remains relatively the same during cleavage as cell divisions occur. Cleavage is the process of rapid cell division without growth, so the overall size of the embryo does not increase significantly.

The heart is the second organ to develop in the embryo, following the development of the neural tube. It starts to form and beat by about the third week of gestation.

A fluid-filled sac that surrounds an embryo is called an amniotic sac. This sac contains amniotic fluid, which provides protection and cushioning for the developing embryo.

The villi on the surface of the placenta increase the surface area available for nutrient and gas exchange between the mother and fetus through the blood vessels. This increased surface area helps ensure efficient transfer of oxygen and nutrients to the fetus and removes waste products from the fetal circulation.

The membrane that encloses the embryo is called the amnion. Its function is to protect the embryo by providing a cushion against physical impact, preventing drying out, and allowing for movement and growth within a fluid-filled environment.

Hox gene mutation can change the organs that develop in specific parts of an embryo. These genes play a crucial role in determining the body plan and segment identity during development. Mutations in Hox genes can disrupt this process, leading to abnormal organ development in specific regions of the embryo.

An egg contributes the majority of the genetic material (chromosomes) needed for the embryo, as well as organelles like mitochondria for energy production. Sperm only provides genetic material.

The embryo sac is considered the female gametophyte in flowering plants because it develops from a megaspore through mitotic divisions and gives rise to the egg cells and other supportive cells necessary for fertilization and seed production. Just like the male gametophyte (pollen grain) produces sperm cells, the embryo sac produces egg cells for sexual reproduction.

Advantages: higher pregnancy rates due to more embryos being transferred, increased genetic diversity in offspring, potential for producing multiple offspring at once.

Disadvantages: increased risk of multiple pregnancies (twins, triplets), higher costs associated with the procedure, potential for complications due to multiple pregnancies.

The amniotic sac is the structure that protects and cushions the embryo during pregnancy. It is filled with amniotic fluid that helps absorb shocks and regulate temperature for the developing fetus.

An embryo inherits a full set of genes through the combination of genetic material from both the egg and sperm during fertilization. Each parent contributes half of their genetic material, resulting in a complete set of genes in the embryo.

The precise site of embryo implantation in a normal pregnancy is usually within the endometrium of the uterus. The embryo typically implants in the upper part of the uterus, in an area called the fundus, or in the anterior or posterior walls of the uterus.

Similar structures in embryos refer to the presence of common anatomical features and developmental patterns observed in the early stages of different organisms. This similarity is often used as evidence to support the theory of common ancestry, suggesting that these organisms share a common evolutionary history. Studying these similarities can provide insights into the relationships between different species and the processes of evolution.

Yes, the thickening of the surface ectoderm to form the neural plate is one of the first visible signs that the nervous system is forming in the embryo. This process marks the beginning of neurulation, during which the neural plate folds and eventually closes to form the neural tube, from which the brain and spinal cord develop.

The blastula is a hollow sphere of cells formed during the early stage of embryonic development. Its main function is to organize cells that will give rise to specialized tissues and organs later in development. The blastula also plays a crucial role in implantation and formation of the germ layers in the developing embryo.

The human embryo does not begin to exist in the mother's womb. Fertilization is one method of reproducing new human beings, and it takes place naturally in the woman's fallopian tube. The new human embryo then travels through the fallopian tube for about a week and then implants into the mother's womb. The embryonic period begins at fertiization and ends at the end of 8 weeks. The fetal period goes from the beginning of 9 weeks until birth.

Carbon dioxide and urea are two waste materials that pass from the embryo to the mother during pregnancy. Carbon dioxide is a byproduct of cellular respiration, while urea is a waste product generated from the breakdown of proteins.