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

What is paediatric clinical literature, What is paediatric clinical literat...

What is paediatric clinical literature The paediatric clinical literature has expanded greatly in its coverage of the wide variety of medical circumstances that can negatively

How a sample contaiinng this isotope decay, Please help with the following:...

Please help with the following: 32P is an unstable isotope of phosphorus that has a half-life of 14.29 days. Atoms of this isotope undergo beta decay in which a neutron decays i

How does biogeography contribute to an evolution, How does biogeography con...

How does biogeography contribute to an understanding of evolution? In biogeography studies, same animals that seem to be closely related are adapted to dissimilar environments

Diverse proteins made by the same total number of amino acid, Q. Are there ...

Q. Are there diverse proteins made by the same total number of amino acids? Diverse proteins with the same total number of amino acids may exist. In such cases the discriminati

Of what subunits are ribosomes are made, Q. Of what subunits are ribosomes ...

Q. Of what subunits are ribosomes are made? Ribosomes are made of two subunits the small subunit and the large subunit. These subunits are made of proteins and ribosomic RNA (r

Dermato phytoses, Dermato phytoses Dermatophytosis (ringworm) is a cos...

Dermato phytoses Dermatophytosis (ringworm) is a cosmopolitan, superficial and highly contagious disease of man, animals and birds. The infection is caused by fungi of three g

What capacity does the brain have to repair itself, What capacity does the ...

What capacity does the brain have to repair itself after injury or disease? It has long been accepted dogma that central nervous system doesn't regenerate itself after traumati

Horse diseases-equine influenza, Equine influenza Equine influenza is ...

Equine influenza Equine influenza is a highly contagious, epizootic disease, which affects equines of all age groups and is caused by influenza virus A/equine virus of family

What are the genotypes of all individuals, 1. In cattle, the polled conditi...

1. In cattle, the polled condition (H) is dominant to the horned condition (h). A cross between an individual with red coat (R) and white coat (W) results in roan (RW). A polled, r

Can you explain aneurysm of aorta, Q. Can you explain Aneurysm of Aorta? ...

Q. Can you explain Aneurysm of Aorta? CXR findings are an enlargement of the involved portion of the aorta. A focal dilatation may simulate a mass or adenopathy. A more general

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