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

Gram - negative bacteria, Organisms of the so-called HACEK group, (Haemophi...

Organisms of the so-called HACEK group, (Haemophilus, Actinobacillus actinomycetemcomitans, Cardiobacterium hominis, Eikenella species, Kingella kingae) which are part of the upper

Virus, what is virus ?? what is classidication , uses , disease of viruses...

what is virus ?? what is classidication , uses , disease of viruses ? what are types of virus ?

Modern biochemistry and cell physiology, This problem set is a little diffe...

This problem set is a little different, in that it is one large project/problem. To answer it, you must write a short single-spaced typed report of 4-5 pages MAXIMUM. Here is the p

Preprocedure care, BRONCHOSCOPY: Bronchoscopy is the passage of lighte...

BRONCHOSCOPY: Bronchoscopy is the passage of lighted bronchoscope into the bronchial tree. Bronchoscopy may be performed with  rigid steel of flexible fiberoptic instruments.

Regarding the complement system, Which of the following is not true regardi...

Which of the following is not true regarding the complement system?Answer This system involves a group of at least 20 proteins found in the blood plasma. During an infection, one p

What are the steps in bacterial infection, It contain four steps. They are:...

It contain four steps. They are: Attachment to host Proliferation Invasion of host tissue Toxin-induced damage to host cell

How vitamin e is directly related to selenium and pufa, How Vitamin E is di...

How Vitamin E is directly related to selenium and PUFA? Selenium: An inter-relationship exists between vitamin E and selenium, as selenium functions as an integral par1

What is a glucose tolerance test, What is a glucose tolerance test? A g...

What is a glucose tolerance test? A glucose tolerance test, usually conducted in the 24 to 28 weeks of pregnancy measures levels of sugar (glucose) in the mother's blood. Abnor

Morphological changes, Morphological changes Aquatic plants produce di...

Morphological changes Aquatic plants produce different kinds of leaves and produce aerenchyma (tissues with air gaps) where there be a need to do so. Also, a thick cuticle on

Which types of mammal are included in the primate group, Which types of mam...

Which types of mammal are included in the Primate group?  The Primate group contains a) Lemurs, b) Monkeys, c) Apes and humans.

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