Coordination

• there are two types of coordination: the nervous system and the endocrine system
• the nervous system sends electrical messages
• the endocrine system sends chemical messages
• the brain and the spinal cord control the nervous system
• glands being controlled by the pituitary gland control the endocrine gland
• the nervous system has a quick effect on the body but doesn't last long
• the endocrine system has a slow effect on the body but a long lasting effect
• the endocrine system is made up of glands that release hormones into the blood
• the endocrine glands make up the capillary network
• hormones: chemicals that affect the body
• the pituitary gland is the master gland of the endocrine system
• the hormones released by the pituitary gland have a direct effect on the body
• the thyroid gland produces thyroxine which controls the metabolism
• the pancreas is a homeostatic organ and dual gland found above the liver
• the pancreas is both a exocrine and endocrine gland
• there are two types of glands

  • endocrine
  • exocrine
• endocrine glands release hormones directly into the blood
• exocrine glands release chemicals through a duct into the body
• pancreas produces two hormones

  • insulin
  • glucagon
• insulin and glucagon are antagonist hormones
• insulin lowers the blood glucose levels
• glucagon raises the blood glucose levels
• the ovaries produce two hormones

  • oestrogen
  • progesterone
• oestrogen repairs the lining of the uterus and releases the Luteinizing hormone
• progesterone thickens the lining of the uterus
• progesterone also prevents mensuration and the contraction of the uterine walls before the birth of the baby
• the testicles are found outside the body because it is the perfect temperature for sperm maturation