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Prenatal development

This animation demonstrates the development of the human embryo and foetus.

Bioloģija

Atslēgvārdi

grūtniecība, mēslošana, sieviešu reproduktīvā organa, auglis, attīstība, implantācija, morula, blastocista, dīgļu slānis, dzeltenuma soma, horiona bārkstiņām, nervu caurule, ekstremitāte, womb, ontogēnija, dzemdes, Fallopijas caurule, maksts, endometrijs, dzemdes kakls, dzemdes kakla os, spermas šūna, zigota, amnija sēklis, nabas saite, olu, embrijs, placenta, menstruācijas, ovulācija, gluds muskulis, cilvēks, Bioloģija

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Gametes

The zygote is the initial cell formed when two gamete cells are joined by means of sexual reproduction.

Male reproductive system

The reproductive system consists of organs which work together for the purpose of reproduction.

Meiosis

Our gametes are haploid cells produced from diploid cells by meiosis, a special type of cell division.

Mitosis

Mitosis is the process by which a eukaryotic cell divides into two cells and the number of chromosomes remains unchanged.

The sense organs

Organs that detect signals of the environment or of the body and transmit them to the brain as nerve impulses.

The reproduction and development of insects

Based on their life cycle, insects can be grouped into three categories: ametabolous, hemimetabolous or holometabolous insects.

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