6th Grade Science Test #1 - Vocab

43 terms by pmollheritagehall 

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Reproduction

Process of producing offstpring (new organism of the same species); always involves the transfer of hereditary information

DNA

hereditary material found inside cells and is passed from a parent to offspring. Determines how an organism looks and functions

Mitosis

process body cells use to reporduce cells that are identical to the parent cell

Sexual reproduction

new organism is produced from the DNA of two organisms combining (called ferilization)

Asexual reproduction

new organism is produced from a part of oanother organism by mitosis and cell division; all DNA comes from one organism

Budding

a new organism grows off of the parent organsim

Regeneration

some organisms can grow new body parts to replace lost parts (ex: sea star)

Cloning

a new organism is produced from the DNA of only one parent and is an exact genetic copy of the parent

rectum

the last 6 to 8 inches of the large intestine; stores feces until elimination through the anus

bladder

stores urine until elimination

urethra

the tube that carries urine (and semen in males) out the the body

penis

a structure made of spongy tissue that deposits sperm into female reproductive tract

Scrotum

an external skin sac holding the testes. Regulates temperature below 98.6 Degrees (3 degrees C) for sperm to form

Testicle (testes)

produces sperm

Epididymis

finger like attachment on the testicle that connects the testicle to the vas deferens

Vas Deferens

thick walled tube that carries sperm to the urethra

Seminal Vesicles

drains into the Vas Deferens, secretes fluid rich in sugars that nourishes the sperm

prostate

a single gland below the bladder that encircles the urethra. It secretes a fluid that neutralizes the acids in the female reproductive system

Cowper's Glad

small gland below the prostate that secretes a fluid that neutralizes traces of acidic urine in the urethra

erection

blood flow to the penis causing the penis to become rigid and erect

ejaculation

the release of semen from the penis

orgasm

rhythmical muscular contractions that occur during ejaculation

testosterone

male hormone involved in the development of secondary sex characteristics (such as facial hair, voice changes, and muscle development)

Vulva

name for all the external genitals

clitoris

the erectile structure located at the front of the vulva. The area of stimulation in the female.

Urethra

the tube that carries urine from the bladder out of the body

Labia

Two skin folds that form the outer lips of the external genitalia. It serves to protect the genitalia.

Vagina

A canal leading from the uterus to the outside of the body. A small opening in the cervix leads to the bagina. Also called the birth canal, it is place for sperm to the deposited

cervix

opening that connects the uterus to the vagina

uterus (aka womb)

the organ that carries a baby

oviduct (aka fallopian tube)

tube that connects the ovary to the uterus and is the pathway for the egg

ovary

produces the egg

ovulation

the process of the ovary releasing an egg

mammary gland

gland in the breast tissue that produces milk

breast

structure that contains mammary glands and fatty tissue

menses

medical name for the mentrual period

menstrual cycle

monthly cycle of changes in a sexually mature female reproductive system

zygote

fertilized egg that has begun to divide

blastocist

ferilized egg after five days

embryo

from conception to the end of the eigth week after conception

fetus

10 weeks after ferilization to birth

labor

muscular contractions of the uterus that begin the birth process

placenta

"sack" of tissue that connects the developing fetus to the uterine wall to allow nutrient uptake, waste elimination and gas exchange via the umbilical cord

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