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

Which is the muscle tissue that moves the bones, Q. Which is the kind of mu...

Q. Which is the kind of muscle tissue that moves the bones? The bones are moved by the skeletal striated muscles these muscles are voluntary (controlled by volition).

What are the disadvantages of mucoperiosteal flap, What are the Disadvantag...

What are the Disadvantages of mucoperiosteal flap More traumatic - flap is raised  Sutures are required and the next procedure of impression is delayed till afterthe suture

Energy budget - ecosystem, Energy Budget - Ecosystem All living things...

Energy Budget - Ecosystem All living things must take in and use energy to maintain their bodies, to grow, to obtain more energy and to reproduce. Each individual has an 'ener

Salmonellosis in poultry, Salmonellosis in poultry A wide variety of se...

Salmonellosis in poultry A wide variety of serovars are prevalent among chicken, turkeys, ducks and geese. The poultry is an important reservoir of salmonellae. The common dise

Modern theory in biology, Modern Theory Naturalistic theory: Accordin...

Modern Theory Naturalistic theory: According to this theory Life originated upon our earth spontaneously from nonliving matter. But there are two significant points in this r

Onchology, Onchology : This is the study of cancer. Oncology word meaning i...

Onchology : This is the study of cancer. Oncology word meaning is mass, bulk & tumor. This is a branch of medicine which deals with tumors (cancer). The one who practices oncology

Cell division, What is telokinesis and how is it different in animal then p...

What is telokinesis and how is it different in animal then plant cells?

What is parasitism, What is parasitism? Parasitism is the ecological in...

What is parasitism? Parasitism is the ecological interaction in which a being lives at the expense of another. The parasite often does not cause immediate death of the host sin

Determine the function of iron for athletes, Determine the function of Iron...

Determine the function of Iron for athletes? Iron carries oxygen and is another important mineral for athletes. It also affects oxygen transport and aerobic metabolism as a com

What do you mean by hemodialysis, Q. What do you mean by hemodialysis? ...

Q. What do you mean by hemodialysis? Hemodialysis is the artificial blood filtration made by specific machines in alternative of the kidneys. Hemodialysis may be necessary in p

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