REPRODUCTIVE SYSTEM

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REPRODUCTIVE SYSTEM

• 7th Grade Science
• NJMS

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FUNCTION

• Reproduction is the process that continues life

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Endocrine System

• The human reproductive system needs hormones to
  function.
• Hormones should be balanced within the body and
  are controlled by many different Glands.

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Pineal Gland

• Produces a hormone that controls rhythms such as
  sleep, body temperature, reproduction, and aging

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Hypothalamus

• The primary connection between the nervous and
  endocrine systems

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Pituitary Gland

• The director of the endocrine system. Secretes
  hormones that control growth, sexual development,
  and the absorption of water into the blood by the
  kidneys.

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Thyroid

• Releases hormones necessary for growth and
  metabolism as well as regulation of calcium

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Thymus

• Helps the body to fight disease by controlling
  the production of white blood cells called T
  cells.

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Adrenal Gland

• Secretes about 30 different hormones that
  regulate carbohydrate, protein, and fat
  metabolism and water and salt levels. They also
  help fight allergies and produce adrenaline.

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Pancreas

• Produces 2 hormones insulin and glucagon. They
  regulate the glucose levels in your blood.

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Hormone Imbalance

• When hormones arent balanced it can sometimes
  cause serious diseases such as diabetes mellitus,
  growth disorders, Osteoporosis, Thyroid
  conditions. Most can be treated and regulated.

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Male Reproductive

• Sperm are produced in the testes and leave the
  male through the penis
• Sperm are specialized cells known as gametes that
  carry genetic material.
• Males begin producing sperm during adolescence.

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Female Reproductive

• Eggs are produced in the ovaries and, if
  fertilized can develop in the uterus
• If an egg is not fertilized, the lining of the
  uterus breaks down and is shed in a process
  called menstruation
• A females menstrual cycle occurs approximately
  every 28 days

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Fertilization

• An egg is released from the ovary
• Fertilization occurs when the egg combines with a
  sperm in the fallopian tube
• The fertilized egg begins to divide
• It moves down the fallopian tube to the uterus
• It implants in the lining of the uterus

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Pregnancy

• For humans pregnancy lasts about nine months
  broken into three periods. The fetus grows and
  develops until it is ready to be born.

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Multiple Births

• They are relatively uncommon in humans.
• Identical twins are produced when a single
  fertilized egg divides in half early in embryo
  development.
• Fraternal twins are produced when two eggs are
  released that same time and fertilized by two
  different sperm. They can be different same or
  different sexes
• 1 in 29 twin births are identical