Human development, Biology

Assignment Help:

Human Development

Human development is a continuous procedure that begins when the ovum from a female is fertilised via sperm from a male to form the zygote. Growth and differentiation transform the zygote into a multicellular adult human being. Though, it is important to realise that development does not stop at birth. It is a continuous procedure. It is usual to divide human development into prenatal and postnatal periods. Prenatal period refers to the period before birth. Throughout this period for the first eight weeks the developing human being is called an embryo since the organ systems are forming. From the 9th week onwards the term foetus is used. The foetal period (9 weeks to birth) is charactrised by growth and elaboration of structures. The postnatal period starts at birth and ends at death. Important developmental changes in addition to growth take place after birth, for example, the development of teeth and the changes during puberty. The brain triples in weight among birth and 16 years of age. Though, most developmental changes are completed by the age of 25.

The 266 days among conception and birth are traditionally divided into about three month periods, each termed as a trimester. We deal with each trimester but more emphasis is given Lo the first trimester as more dramatic changes take place during this period. But before we discuss the development of the human embryo it is significant to recapitulate the process of gametogenesis and the general structure of the female reproductive tract as the entire prenatal period is spent inside the womb of mother.


Related Discussions:- Human development

Circulation - initiation of cpr, Circulation: If central pulses (femor...

Circulation: If central pulses (femoral  in infants and  carotid in  children) are not  palpable, begin chest compression without losing any time.  In  young infants, encircle

Role of government in health care provision, Role of Government in Health C...

Role of Government in Health Care Provision The government intervenes in the health sector with a general view of improving the health status of the people. In general governm

What is the difference between catabolism and anabolism, Q What is the diff...

Q What is the difference between catabolism and anabolism? Metabolism comprises two opposing processes: catabolism and anabolism. Anabolism is a set of synthesis reactions that

Explain the digestibility coefficient - proteins, Explain the Digestibility...

Explain the Digestibility Coefficient? You have earlier learnt that dietary proteins are hydrolyzed to amino acids during digestion. The digestion begins in the stomach by the

Determine the atp-sensitive potassium channel, ATP-sensitive potassium chan...

ATP-sensitive potassium channel A. The channel is a spanning protein with a receptor site for ATP located on an intracellular region of the protein. B. When blood plasma lev

Steps to determine thermal resistance of microorganism, Define Steps To det...

Define Steps To determine thermal resistance of a microorganism? Most food components and microorganisms obey first order reaction kinetics, which means that the destruction ra

What are primary mediators, Primary mediators are those, which are produced...

Primary mediators are those, which are produced before degranulation. These primary mediators are stored in granules. Some of the primary mediators are histamine, heparin, protease

Emboly movement - involution, Emboly Movement - Involution It den...

Emboly Movement - Involution It denotes turning in or rolling over. Involution of mesodermal blastomeres has been observed in Amphioxus, reptiles, monotremes, amphibians,

Gas exchange, Gas Exchange Gill surface area must be large enough to p...

Gas Exchange Gill surface area must be large enough to provide adequate exchange of gases. Therefore, highly active fish have largest relative gill area. Figure compares highl

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd