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The Reproductive System
In the endocrine system __________ help regulate and coordinate body systems.
The endocrine glands found throughout the body manufacture chemical messengers called __________.
Endocrine glands release hormones directly into the blood because they are __________.
In a __________-__________ system the endocrine glands gives chemical messages to control the production and release of hormones.
The __________ reproductive system has both internal and external organs.
The __________ are organs that produce the male hormone testosterone and reproductive cells called sperm.
The testes produce reproductive cells called __________.
Internal organs combine sperm with a fluid energy source producing __________.
Internal organs called __________ produce egg cells.
Once a month the __________ process releases an egg.
A hollow, pear-shaped, muscular organ in which fertilized eggs develop is called the __________.
The __________, or birth canal, is a muscular tube that opens to the outside of the body.
The monthly cycle of changes in the female reproductive system is called the __________ __________.
Endocrine hormones called __________ and progesterone control the menstrual cycle.
Endocrine hormones called estrogen and __________ control the menstrual cycle.
The release of blood and the uterine lining tissue that occurs in phases in the female reproductive system is called __________.
Phase one of the menstrual cycle begins when __________ __________ starts and usually lasts about 4 to 6 days.
Phase two of the menstrual cycle involves the thickening of the uterus lining and __________, or egg release.
Phase 3 of the menstrual cycle continues with uterine preparation and ends with __________ hormone levels and uterine lining breakdown if no fertilized egg arrives.
The gradual shutdown of the ovaries which end ovulation and menstrual periods is called __________.
The uniting of the egg and sperm is called __________.
When the nucleus of the sperm joins with the nucleus of the egg a cell called a __________ is formed.
A zygote divides into more genetically identical cells by a process called __________.
When more than one egg is fertilized __________ twins will develop.
When the egg or the zygote splits in two __________ twins develop.
Fraternal twins form from __________ different eggs and __________ different sperm.
Identical twins form from __________ egg and __________ sperm.
__________ births result from multiple egg release (fraternal twins) or division of the zygote (identical twins).
The period of development before birth is called __________.
When the zygote moves from the oviduct to the uterus it attaches and becomes an __________.
The __________ __________ connects the embryo to the placenta which provides nourishment from the mother and removes wastes from the embryo.
The __________ __________ cushions the embryo and stores nutrients and wastes.
The embryo is called a __________ after the first two months of development.
During the birthing process __________ __________ of the uterus push the baby out through the vagina.
After the baby is born the __________ __________ is cut.
Babies who cannot be delivered through the birth canal must be delivered by a surgery called a __________ __________.
The first 18 months of life is called __________.
Newborns experience fetal __________ as they adapt to life outside the uterus.
The first four weeks of infancy is known as the __________ period.
Human babies __________ on their parents for survival.
From 18 months to puberty a child's physical and mental development continues. During this time a human is in the stage of __________.
When a child hits puberty (reproductive maturity) the child is now in the __________ stage of life.
During adolescence hormones cause males and females to develop __________ __________ characteristics.
From age 18 through old age a person is in his/her __________ stage.
During __________ a person's muscles and bones stop growing.
In __________ adulthood (30 to 60) the body begins to slowly decline.
After age 60 a person enter __________ adulthood.
The average life span of a human today is age __________ __________.
Tissues affected by hormones.
Male reproductive cells.
Male reproductive organs.
Produce eggs in the female.
Muscular organ in which a fertilized egg develops into a baby.
The birth canal.
The process of releasing eggs on a monthly basis.
The monthly discharge of the lining of the uterus.
This occurs when the menstrual cycle becomes irregular and then stops.
The fertilized egg during the first two months of pregnancy.
A mixture of sperm and fluid.
The monthly cycle of changes in the female reproductive system.
This cushions the developing baby.
The developing baby after the first two months of pregnancy.
The period of development lasting nine months.
These are endocrine secretions.
This endocrine gland produces a hormone called melatonin that helps your body to regulate wake/sleep patterns.
This endocrine gland produces hormones that affect a wide range of body activities, from growth to reproduction.
This endocrine gland produces infection-fighting cells called T-helper cells or T-cells. These are a special type of white blood cell.
This endocrine gland primarily produces a hormone called testosterone.
This hormone plays an important role in the production of sperm and secondary male characteristics.
This endocrine gland produces hormones that regulate metabolic rate, control the uptake of calcium by bones, and promotes normal nervous system development.
These endocrine glands help regulate calcium levels in the body.
These endocrine glands produces a variety of hormones and some of these play a critical role in helping your body adapt to physical and emotional stress.
This endocrine gland produces a hormone called insulin which helps your body to control blood sugar levels in the bloodstream.
These endocrine glands produce the hormones estrogen and progesterone which help regulate the female reproductive cycle and are responsible for producing and maintaining female sex characteristics.