| A | B |
|---|
| fertilization | the joining together of two special cells, one from each parent |
| egg cell | the cell from the mother that play a part in fertilization |
| sperm cell | the cell from the father that enters the egg cell during fertilization |
| cell | basic units or building blocks of life |
| tissue | cells that do similar jobs |
| organs | different kinds of tissues are combined in larger structures called this |
| systems | groups of organs that work together form these |
| uterus | a pear-shaped organ inside a female's body where a fetus is nourished |
| embryo | developing organism from fertilization to about the eighth week |
| placenta | a thick, rich lining of tissue that builds up along the wall of the uterus |
| umbilical cord | a tube that connects the fetus and the mother's placenta |
| stage 1 of birth | mild contractions signal the beginning; cervix begins to open |
| stage 2 of birth | cervix is open to 4 inches; strong contractions; baby is born |
| stage 3 of birth | contractions continue until the placenta is pushed out |
| Sexually transmitted infections or STIs | infections spread from person to person through sexual conact |
| abstinence | when you don't do something; you abstain from it |
| abstinence | the only sure way of avoiding an STI or getting pregnant |
| chlamydia | silent STI- can cause serious damage to reproductive organs |
| genital herpes | cannot be cured;periodic bouts of painful blister on the genitals |
| genital warts | caused by HP virus; linked to cervical and skin cancer |
| gonorrhea | caused by a bacteria; joint pain; no symptoms until it's advanced |
| syphilis | very serious; if left untreated it can cause blindness, paralysis, insanity, and death |
| Aids | acquired immunodeficiency syndrome |
| HIV | human immunodeficiency virus |
| Aids | deadly disease that interferes with the body's natural ability to fight infection |
| HIV | The virus that causes AIDS |
| carrier | a person who appears healthy but is infected with HIV and can pass it to others |
| HIV is spread by | unprotected sexual contact with an infected person;piercing the skin w/ a needle that was previously used;during pregnancy; transfusions |
| HIV is not spread by | through the air;casual contact w/ an infected person (like shaking hands); mosquitoes;sharing eating utensils;donating blood |
| Blood tests | detect the HIV virus; can take up to 6 months after contact to detect |
| all major organs have formed | by the end of the second month |
| the mother can feel the fetus move | by the end of the fourth month |
| the fetus can kick and hear sounds | by the end of the sixth month |
| the fetus now weiths around seven to nine obs and is eighteen to twenty inches long. | by the end of the end of the ninth month |
| end of first month | the fetus is about 1/3 in. long. Heart, brain, and lungs are forming. |
| weighs about 1 ounce and is about 3 inches long. Fetus begins to move around | end of third month |
