Germ layer

Separation through Ion Exchange Chromatography Introduction Amino acids are important molecules that serve as building blocks for all proteins that are made in every organism. Although there are millions of different proteins that can be made by all living things combined, all proteins are derived from a base of 20 amino acids that are combined together in different ways to create the diversity of life that is on Earth. Humans cannot produce all of the amino acids needed for protein synthesis,…

To identify the unknown chemical mixture (#757), a TLC analysis was conducted using three standards (aspirin, acetaminophen, and caffeine). A TLC plate was prepared by drawing an origin line and solvent front line with a pencil. Three spot were labeled A, B, and C. A sample of each standard was spotted on the analytical TLC plate approximately 1cm from the bottom of the plate. It was then enclosed in a jar filled with 2ml of 95% ethyl acetate- 5% acetic acid. (Another laboratory group conducted…

Introduction The purpose of experiment was to identify an unknown analgesic drug using thin-layer chromatography (TLC). Using the thin-layer chromatography to determine the composition of the Acetaminophen, Aspirin, Caffeine and Salicylamide, then compared with unknown analgesics. Experiment Scheme Acetaminophen Aspirin Caffeine Salicylamide C8H9NO C9H8O4 C8H10N C7H7NO Figure 1. The Chemical structure of Acetaminophen, Aspirin, Caffeine…

of which it contains mature/ immature tissues of germ cells (pleuripotent origin). Mature teratomas are classified as cystic, solid or monodermal. In mature teratomas – most commonly mature ectodermal elements like skin, hair, sweat and sebaceous glands are notified, whereas in Immature teratomas –show only solid mass tissues (1).Immature teratoma composed of mixture of embryonic and adult tissue derived from all the three germ layers, of which main component is neurogenic but…

blastula divides itself into two layers called the embryoblast (inner cell mass) and the trophoblast (outer layer) (Biology.OpenStax.1754). The inner cell mass will continue to develop the embryo, and the trophoblast will eventually become part of the placenta, providing nutrients, waste removal, and oxygen to the embryo. However, the blastocyst first attaches to the uterus, called implantation, before the trophoblast becomes part of the placenta.…

internally. Flatworms is part of the phylum named Platyhelminthes, that is part of kingdom Animalia. They are usually soft and flat, and they also have internal organ systems and tissues. Flatworms are the simplest organisms that have three embryonic germ layers, are bilaterally symmetrical, and have the feature of cephalization. Cephalization is the concentration of sensory organs and some other organs at the anterior end of the body, or the front end. This forms a head and a brain both during…

findings of the basic fundamentals of embryology. Raised in a family of military officials, von Baer decided to choose his own path in life and pursue the study of embryology (Oppenheimer). His many discoveries, including the mammalian ovum and the germ layer theory has allowed modern day scientists to further the understanding of embryology. Karl Ernst von Baer was born on February 29, 1792. He was born to first cousins Juliane Louise von Baer and Magnus Johann van Baer. He was one of ten…

ovaries have an ovoid shape and are usually 3-5cm long. They are a layered structure with an outer layer germinal epithelium, tunica albuginea, cortex and medulla that is innermost (fig. 1). Although now challenged by recent discoveries (1), the germinal epithelium; a continuation of the peritoneum, is inaptly named due the mistaken belief that germ cells arise from this surface layer. Instead germ cells are more likely to arise from the gonadal tissue itself (2). Spindle shaped cells called the…

Embryonic stem cells (ES) are pluripotent cells that can generate different germ layer cells. ES has the potential to be used for drug screening and research of diseases like juvenile diabetes, spinal defects/ injury, and many more (Takahashi et al., 2007). These ES can be from in human embryos, but there are many ethical conflicts…

acts a protects the body . The skin has many functions that greatly benefit the body. The functions are Protection, sence of touch, and it controls temperfature. Protection: The skin helps to keep bacteria and dangerous stuff out of our body, like germs and dirt that can cause infection. Adding on it helps retain water. Sence of Touch: The skin is hoem of one of our five senses: touch. Within our skin thre are thousands of sensors that send information to the brain about things we touch. They…