Human reproductive system , organ system by which humans reproduce and bear live offspring. Provided all organs are present, normally constructed, and functioning properly, the essential features of human reproduction are 1 liberation of an ovum , or egg , at a specific time in the reproductive cycle, 2 internal fertilization of the ovum by spermatozoa, or sperm cells, 3 transport of the fertilized ovum to the uterus , or womb, 4 implantation of the blastocyst, the early embryo developed from the fertilized ovum, in the wall of the uterus, 5 formation of a placenta and maintenance of the unborn child during the entire period of gestation , 6 birth of the child and expulsion of the placenta, and 7 suckling and care of the child, with an eventual return of the maternal organs to virtually their original state. For this biological process to be carried out, certain organs and structures are required in both the male and the female. The source of the ova the female germ cells is the female ovary ; that of spermatozoa the male germ cells is the testis. In females, the two ovaries are situated in the pelvic cavity; in males, the two testes are enveloped in a sac of skin, the scrotum , lying below and outside the abdomen. Besides producing the germ cells, or gametes , the ovaries and testes are the source of hormones that cause full development of secondary sexual characteristics and also the proper functioning of the reproductive tracts.
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Students will be able to identify the four lobes of the brain. Students will be able to identify the function of the four lobes of the brain. Bookmark this to easily find it later. Then send your curated collection to your children, or put together your own custom lesson plan. My Education. Log in with different email For more assistance contact customer service. Entire library.
You can learn to play on a pipe organ or electronic organ or your choice. Being a Church organist and choir director since age 16 , I can help you to read the Hymnals and understand the liturgical services of many different denominations. You can also learn how to play popular music using all the sounds available on the keyboards and foot pedals. Hello, potential piano proteges'! Being a piano protege as a child myself, I have been teaching piano, organ, and flute for over 25 years since, and I currently have students that range from children to adults.
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