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LCE SCIENCE
Human Biology & Health Ch 7 Section 1 - 3
| Term | Definition |
|---|---|
| endocrine gland | a structure of the endocrine system which produces and releases its chemical products directly to into the bloodstream |
| hormone | the chemical product of an endocrine gland |
| target cell | a cell in the body that recognizes a hormone's chemical reaction |
| hypothalamus | a part of the brain that links the nervous system and the endocrine system |
| pituitary gland | an endocrine gland that controls the many body activities |
| negative feedback | a process in which a system is turned off by the condition it produces |
| egg | a female sex cell |
| sperm | a male sex cell |
| fertilization | the joining of a sperm cell and an egg cell |
| zygote | a fertilized egg, produced by the joining of a sperm and an egg |
| testis | organ of the male reproductive system in which sperm and the testosterone are produced |
| testosterone | a hormone produced by the testes that controls the development of of physical characteristics in mature men |
| scrotum | an external pouch of skin in which the testes are located |
| semen | a mixture of sperm and fluids |
| penis | the organ through which both semen and urine leave the male body |
| ovary | organ of the female reproductive system in which eggs and estrogen are produced |
| estrogen | a hormone produced by the ovaries that controls the development of eggs and adult female characteristics |
| fallopian tube | a passageway for eggs from an ovary to the uterus |
| uterus | the hollow muscular organ of the female reproductive system in which a fertilized egg develops |
| vagina | a muscular passageway leading to the outside of the body; also called the birth canal |
| menstrual cycle | 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. |
| ovulation | the process in which a mature egg is released from the ovary into a fallopian tube |
| menstruation | the process in which the thickened lining of the uterus breaks down and blood and tissue then pass out of the female body through the vagina |
| embryo | a developing human during the first eight weeks after fertilization has occured |
| fetus | a developing human from the ninth week of development until birth |
| amniotic sac | a fluid filled sac that cushions and protects a developing embryo and fetus in the uterus |
| placenta | a membrane that becomes the link between the developing embryo or fetus and the mother |
| umbilical cord | a rope like structure that forms between the embryo or fetus and the placenta |
| adolescence | the stage of development between childhood and adulthood when children become adult physically and mentally |
| puberty | the period of sexual development in which the body becomes able to reproduce |
Created by:
mrsschaaf
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