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6th Grade Science Test #1 - Vocab

STUDY
PLAY
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