science quiz

Fertilization

The unfertilized egg is activated by fusion with the sperm in the fallopian tube.

Cleavage

The zygote cleaves by mitosis as It moves down the uterus.

Blastulation

The embryo forms a hollow ball and 3-6 days after fertilization becomes implanted in the uterus.

Gastrulation

The placenta forms around the 2-week old embryo.

Neurulation

The 3-week old embryo, 2 mm in size, develops muscle tissues, vertebra, and blood vessels, nervous system

Organogenesis

The one month old embryo is 1/2% cm in size, and forms body organs.

Continued Morphogenesis

The embryo, now 2 months, shows miniature limbs as hands, arms, elbows, legs, knees.

End of 1st trimester

The fetus, now 3 months, has complete organs.

2nd trimester

There is heartbeat detected and fine body hairs. The fetus is 1 foot long and 2 1/4 pounds.

3rd Trimester

There is a period of growth, the fetus reaches 6-9 pounds.

implantation

When the embryo reaches the uterus, it attaches itself to the soft tissues of the uterine wall.

Intersexuality

describes the condition when a person's genitalia and/or sexual traits are not clearly male or fernale

Cryptorchidism

This term is derived from the Greek words kryptos,

meaning hidden, and orchis, meaning testicles.

Cervical cancer

a growth of cells that starts in the cervix. The cervix is the lower part of the uterus that connects to the vagina. Various strains of the human papillomavirus, also called HPV, play a role in causing most cervical cancers

Prostate cancer

a growth of cells that starts in the prostate. The prostate is a small gland that helps make semen. It's found just below the bladder.

Gonorrhea

a highly contagious STD caused by the bacterium Neisseria gonorrhoeae. If untreated, it can quickly spread through the reproductive tract and cause scarring that blocks the pathways of egg or sperm cells, leading to infertility. In women, it may block the fallopian tubes; in men, it can affect the epididymis and vas deferens. The bacteria can also infect the urethra of both sexes, causing urethritis.

Syphilis

a highly contagious STD caused by the bacterium Treponema pallidum. Symptoms may not appear until the disease is already advanced, so diagnosis often relies on blood tests and tissue samples. Without early treatment, syphilis progresses through three stages with different symptoms. The first stage involves a painless sore called a chancre, which forms where the bacteria entered the body. At this early stage, treatment with penicillin is usually effective.