Mesoderm

Their are different hormones that help in the process of pregnancy , which are called pregnancy hormones the main hormones heard about when pregnancy hormones are mentioned are HCG ( Human Chorionic gonadotropin) ,Progesterone , prolactin and estrogen . HCG is the hormone responsible for keeping the structure of where the embryo will develop at early stages (called corpus luteum) from being shed and absorbed back into the body.HCG also stimulates the secretion of progesterone and estrogen by…

Chordata is a phylum of the animal kingdom that includes animals possessing notochord, pharyngeal gill slit and dorsal tubular nerve cord. Although the name Chordata is attributed to William Bateson (1885), it was already prevalent around 1880. Phylum Chordata, though not the largest, is the most diverse phylum in the animal kingdom. Chordates are cosmopolitan and are well represented in marine, freshwater as well as terrestrial habitats from the equator to the high northern and southern…

throughout the body that divide to replenish dying cells and regenerate damaged tissues. Tissue stem cells can also b referred to as somatic, or adult stem cells. Blood stem cells are also known as hematopoietic stem cells because they are derived from mesoderm and located in the red bone marrow, which is contained in the core of most bones. Skin stem cells are extremely important tissue in our bodies, since it protects us from infection, dehydration, allows us to feel pressure, and fell…

1.6.3 Hematopoisesis in zebrafish Within the past two decades, the zebrafish (Danio rerio) has become an excellent model to study the development of hematopoietic stem cells (HSCs). The genes and molecular signaling pathways controlling hematopoiesis are highly conserved between fish and mammals. Both share all major blood cell types that are generated from common lineages of hematopoietic stem cells [13]. This is an important advantage over invertebrate models that lack the complex…

period. In the first phase, germinal stage, “the zygote begins to divide and grow in complexity during the first two weeks following conception” (Feldman, 2014). In the embryonic stage the zygote forms into an embryo and the ectoderm, endoderm, and mesoderm forms. The last phase is fetal and in this stage, the child begins to grow…

Introduction The gastrointestinal system (digestive system) is the alimentary tract from the mouth to the anus with its associated glands and organs (Moore, 2016) It originates from two germ layers, the endoderm and mesoderm, and receives nerve supply by cells derived from the third germ layer, the ectoderm(van den Brink, 2007) (McLin et al., 2009) The earliest stage of development is the ‘primordial gut’ which forms during the 4th week as the head, tail (caudal eminence) and lateral folds.…

Planarians are triploblastic acoelomates, meaning they have three tissue layers, ectoderm, mesoderm, and endoderm (Newmark and Alvarado, 2001). Their epidermal layer that surrounds the planarian is ciliated on the ventral surface (Newmark and Alvarado, 2001). Underneath the epidermal layer and the basal lamina, followed by a complex wall musculature that surrounds the body. The complex wall muscle is composed of the circular diagonal and muscle fibers (Newmark and Alvarado, 2001). The nervous…

According to the guttmacher.org it states that the defintion of pregnancy is when “A woman is consider pregnant only when a fertilized egg has implanted in the wall of a females uterus.” This paper will be covering the Development periods and the Trimester. implanted in the lining of the women uterus. When a female is pregnant she will go through an orderly sequence that takes her through stages as the soon to be baby begins to grow. The term prenatal development is broken down into three…

What is the relevance of embryonic study to clinical medicine? Embryology consists of investigation of the cellular, molecular and structural factors contributing to the formation of an organism. It also provides a logical framework for understanding human anatomy. The fundamental knowledge of embryonic study is important for creating health care strategies for better reproductive outcomes. The expanding understanding on embryology has resulted in new techniques being developed for therapeutic…

Locomotion is the movement of a body from one place to another. There are various ways in which species of organisms in the 9 major phylum classes of the kingdom Animalia adapted unique muscle systems and how they use them. A phylum class includes organisms that are different but share important characteristics that resulted from evolutionary relationships among major groups of animals that allowed organisms to adapt in terms of the way they locomote. The Phylum Porifera is made up of sea…