integumentary system Flashcards
structure of the integumentary system
epidermis, dermis, subcutaneous/hypodermis
epidermis
the outermost layer skin that provides a waterproof barrier and protects the body from infection
dermis
is the middle layer of skin that contains blood vessels nerves, hair follcles, and sweat glands
hypodermis
is the innermost layer of skin that consist of fat and connective tissue
functions of integumentary system
protection, excretion, sensation
protection
skin protects the body from harmful substances like UV rays, excessive water loss, melanocytes produce melanin that helps potects against ultraviolet radiation
excretion
the sweat glands help to regualte body temperture by producing sweat that evaporates and cools the body. sweat contains trace amounts of lactic acid, urea, alcohol
sensation
the skin is packed with nerve endings that allow us to feel touch, pressure, heat, cold
how the integumentary system helps the body reach homeostasis
by regulating body tempature and fluid balance
too warm
blood vessels in the skin dilate and sweat is produced to cool the body off
too cold
blood vessels in the skin costrict to mantain heat
glands of the endocrine system
pituitary gland, thyroid gland, parathyroid gland, adrenal, pacreas, ovaries, testes, thymus gland
pituitary gland
is the master gland of the endocrine system and produces growth hormone, prolactin, andrenocorticotropic hormone
thyroid glad
produces thyroxine and calcitonin thyroxine helps to regulate metabolism, while calcitonin helps to regulate calcium levels in the blood
parathyroid gland
produces parathyroid hormone, which helps to regulate calcium levels in the blood
thymus gland
produces thymosin, which helps to develop the immune system
adrenal gland
produces epinephrine and norepinephrine, which helps regulate the fight or flight response
pancreas
produces insulin and glucagon, which helps to regulate blood sugar levels
ovaries
produces estrogen and progestrone, which helps regulate menstrual cycle
testes
produces testorene which helps regulate the development of the male reproductive organs and secondary sex characterstics
fuctions of the endocrine system
growth and development, metabolism, reproduction, mood , lipid based hormones, nonpolar fat- solunble hormones,water soluble hormones
growth and deleopment
hormones play a role in. regulating growth and development
metabloism
hormones play a role in regulating metabloism
reproduction
hormones play a role in reproduction