Development of the human body is the process of growth to maturity. The process begins with fertilization, where an egg released from the ovary of a female is penetrated by a sperm cell from a male. The resulting zygote develops through mitosis and cell differentiation, and the resulting embryo then implants in the uterus, where the embryo continues development through a fetal stage until birth. Further growth and development continues after birth, and includes both physical and psychological development that is influenced by genetic, hormonal, environmental and other factors. This continues throughout life: through childhood and adolescence into adulthood.
Human embryonic development and Prenatal development
Development before birth, or prenatal development () is the process in which a zygote, and later an embryo, and then a fetus develops during gestation. Prenatal development starts with fertilization and the formation of the zygote, the first stage in embryonic development which continues in fetal development until birth.
Human fertilization
Fertilization occurs when the sperm successfully enters the ovum's membrane. The chromosomes of the sperm are passed into the egg to form a unique genome. The egg becomes a zygote and the germinal stage of embryonic development begins. The germinal stage refers to the time from fertilization, through the development of the early embryo, up until implantation. The germinal stage is over at about 10 days of gestation.
The zygote contains a full complement of genetic material with all the biological characteristics of a single human being, and develops into the embryo. Embryonic development has four stages: the morula stage, the blastula stage, the gastrula stage, and the neurula stage. Prior to implantation, the embryo remains in a protein shell, the zona pellucida, and undergoes a series of rapid mitotic cell divisions called cleavage. A week after fertilization the embryo still has not grown in size, but hatches from the zona pellucida and adheres to the lining of the mother's uterus.
Cette page est générée automatiquement et peut contenir des informations qui ne sont pas correctes, complètes, à jour ou pertinentes par rapport à votre recherche. Il en va de même pour toutes les autres pages de ce site. Veillez à vérifier les informations auprès des sources officielles de l'EPFL.
The goal of this course is to learn to analyze a scientific paper critically, question if the data support the conclusions, and produce constructive referee reports in written or oral form. The papers
This course introduces theoretical developments and empirical evidence on city population change worldwide, as well as on its interactions with sustainable development.
Le but est de connaitre et comprendre le fonctionnement des systèmes cardiovasculaire, urinaire, respiratoire, digestif, ainsi que du métabolisme de base et sa régulation afin de déveloper une réflect
La puberté est une étape du développement qui est atteinte lorsque les organes de la reproduction sont fonctionnels. Chez l'humain, elle désigne la transition de l'enfance à l'adulte. Elle se signale notamment par une croissance rapide due aux hormones de croissance et le développement des caractères sexuels primaires et secondaires dû aux hormones sexuelles, avec de notables changements comportementaux notamment un besoin accru de sommeil lié à un décalage de libération de la mélatonine.
Humans, or modern humans (Homo sapiens), are the most common and widespread species of primate. A great ape characterized by their hairlessness, bipedalism, and high intelligence, humans have a large brain and resulting cognitive skills that enable them to thrive in varied environments and develop complex societies and civilizations. Humans are highly social and tend to live in complex social structures composed of many cooperating and competing groups, from families and kinship networks to political states.
vignette|240px|Adolescents polonais. L'adolescence (du latin ădŏlēscēns, -centĭa, ) est une phase du développement humain physique et mental qui se produit pendant la période de la vie humaine s'étendant de la puberté jusqu'à l'âge adulte. Les critères de définition de l'adolescence ont varié au fil de l'histoire. L'entrée dans l'adolescence est généralement marquée par les changements biologiques déclenchés par des changements hormonaux de la puberté, et sa durée sur le plan social est liée au degré de dépendance financière envers les parents.
Plonge dans les mécanismes de la structure des organes et de la croissance chez les embryons, en se concentrant sur le rythme de somitogénèse et l'horloge de segmentation.
Explore la transition mère-zygotique dans le développement embryonnaire précoce, en se concentrant sur des processus clés tels que l'activation du génome zygotique et la régulation du cycle cellulaire.
Explore la diffusion, la croissance logistique, les circuits génétiques, les gradients de morphogène et la propagation des ondes dans les systèmes biologiques.
Localized sources of morphogens, called signalling centres, play a fundamental role in coordinating tissue growth and cell fate specification during organogenesis. However, how these signalling centres are established in tissues during embryonic developmen ...
Countless aspects of touch and closeness have been questioned in an unprecedented way during the recent Covid epidemic. Social practices as banal as greetings were both reflexively and practically challenged and sometimes deeply altered, resulting in painf ...
Background Puberty is a highly heritable and variable trait, with environmental factors having a role in its eventual timing and development. Early and late pubertal onset are both associated with various diseases developing later in life, and epigenetic c ...