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

Neurosecretory systems, Neurosecretory Systems Almost all groups of m...

Neurosecretory Systems Almost all groups of multicellular animals have been investigated to find out if neurosecretory cells are present in them. Such investigations have sho

What do you mean by syconoid sponge., What do you mean by Syconoid sponge. ...

What do you mean by Syconoid sponge. Of different sponge architectures, this is intermediate in its complexity. Spongocoel is no longer lined with choanocytes, now located in r

Lymph, why is it known as middle man

why is it known as middle man

Explain about the biosensors and caramelization, Explain about the Biosenso...

Explain about the Biosensors and Caramelization? Biosensors:  A device that utilizes biological materials to monitor the presence of several chemicals in a substance. Carame

Biological sickness of soil, what is biological sickness of soil and its ma...

what is biological sickness of soil and its management

Define hepatic triglyceride synthesis, Q. Define Hepatic Triglyceride Synth...

Q. Define Hepatic Triglyceride Synthesis? Fatty acid flux to the liver from adipose tissue appears to be an important determinant of hepatic triglyceride synthesis and VLDL sec

Sex, how to do sex ?

how to do sex ?

What are nutritional care related to neurological disorder, What are nutrit...

What are nutritional Care related to Neurological Disorder? Let us then move on to the nutritional care. The important goals of nutritional care are to: prevent further

Gutta percha removal-endodontics principles, Gutta percha removal: Poor...

Gutta percha removal: Poorly condensed GP or single cone technique, -    Hedstrom hand files. -    Barded broaches. The well condenced GP: -    Rotary files; -    Ultrasoni

Solitary and colonial forms, Solitary and Colonial Forms Animals may l...

Solitary and Colonial Forms Animals may lead their lives either like individuals or in groups. While they exist as individuals, they are termed as solitary, but if they live i

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