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endocrine and reproductive system
7th grade science chapter 16
35
Science
7th Grade
02/15/2011

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Term
endocrine gland
Definition
a structure of the endocrine system that produces and releases it's chemical products directly into the bloodstream
Term
hormone
Definition
a chemical product of an endocrine gland that produces  a specific effect such as growth or development
Term
target cell
Definition
a cell in the body that recognizes a hormones chemical structure
Term
hypothalamus
Definition
a part of the brain that links the nervous system and the endocrine system
Term
pituitary gland
Definition
an endocrine gland that controls many body activities
Term
negative feedback
Definition
a process in which a system is turned off by the condition it produces
Term
egg
Definition
a female sex cell
Term
sperm
Definition
a male sex cell
Term
testis
Definition
organ of the male reproductive system in which the sperm and the testosterone
Term
testosterone
Definition
a hormone produced by the testis that controls the development of physical characteristics in mature men
Term
scrotum
Definition
an external pouch of skin in which the testis are located
Term
semen
Definition
a mixture of sperm and fluids
Term
penis
Definition
the organ through which both semen and urine leave the male body
Term
urethra
Definition
a small tube through which urine flows from the body
Term
ovary
Definition
a flower structure that encloses and protects ovules and seeds as they develop/system which eggs and estrogen are produced
Term
estrogen
Definition
a hormone produced by ovaries that controls the development of eggs and adult female characteristics
Term
fallopian tube
Definition
a passageway for eggs from an ovary to the uterus
Term
uterus
Definition
the hollow muscular organ of the female reproductive system in which a fertilized egg develops
Term
vagina
Definition
a muscular passageway leading to the outside of the body   also called the birth canal
Term
menstrual cycle
Definition
the cycle of changes that occurs in the female reproductive system during which an egg develops and the uterus prepares for the arrival of a fertilized egg
Term
follicle
Definition
structure in the dermis of the skin from which an egg matures in an ovary
Term
ovulation
Definition
the process in which a mature egg is released from the ovary into a fallopian tube
Term
menstruation
Definition
the process in which the thickened lining of the uterus breaks down and blood and tissue then pass out of the female body
Term
embryo
Definition
a young organism that develops from a zygote
Term
differentiation
Definition
the process by which cells change in structure and become capable of carrying out specialized functions
Term
fetus
Definition
a developing human from the ninth week of deveopment until birth
Term
amniotic sac
Definition
a fluid filled sac that cushions and protects the embryo and fetus in the uterus
Term
placenta
Definition
a membrane that becomes the link between the developing embryo or fetus and the mother
Term
umbilical cord
Definition
a rope like structure that forms between  the embryo or fetus and the placenta
Term
adolescence
Definition
the stage of development between childhood and adulthood when children become adults physically and mentally
Term
puberty
Definition
the period of sexual development in which the body becomes able to reproduce
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