chapter 11 Flashcards
built- in maintenance of a stable internal environment
homeostasis
system of the body designed for homeostasis
integumentary system
covers the outside of the body
skin
the part of the skin that is exposed to the environment
epidermis
a build up of epidermal cells
callus
a tough, water-proof protein fiber, is manufactured in the cytoplasm, strengthening and hardening the cell
keratin
the pigment of the skin
melanin
the second layer of the skin
dermis
underneath the dermis is also the layer of tissue
subcutaneous layer
a natural process that protects your skin from the harmful ultraviolet rays of the sun
tanning
a painful inflammation resulting from toxic substances released by dead or damaged skin cells
sunburn
one of the most serious types of skin cancer
malignant melanoma
the oil that waterproofs your skiing and keeps it soft and flexible
sebum
helps regulate the body’s temperature (helps cool the body off)
sweet glands
the removal of waste substance from the body
excretion
liquid waste
urine
most important excretory organs
kidneys
the tubes that urine passes through
ureters
stores urine from the bladder to the outside of the body
urethra
a microscopic network of blood vessels
nephrons
the process of fluid getting filtered into the blood
reabsorption
the enzymes that the kidneys produces if your blood pressure drops too low
renin
production of the hypothalamus, resulting in too much urine output
ADH(antidiuretic)
allows efficient control of the entire body over longer periods of time
endocrine
manufacture and secrete their product into the blood
endocrine glands
the messengers produced by the endocrine glands
hormones
the master gland
pituitary gland
growth hormones
somatotropin
regulates the rate of chemical activity in the body’s cells
thyroid gland
a hormone that regulates general activities related to metabolism
thyroxine
swelling in the neck
simple goiter
produces the pancreatic hormone insulin
islets of langerhans
results when the pancreas does not produce adequate amounts of insulin
diabetes mellitus
increased amount when you are excited or alarmed and has a marked influence on your body
epinephrine
another name for epinephrine
adrenaline
the hormones that the outer shell of the adrenal glands produce
steroids
the regulation of the body’s waking and sleeping cycles
pineal gland
designed to carry out the process of fertilization to form a new living thing
reproductive system
sperm cells and egg cells
gametes
main reproductive organs
gonads
the time of physical transition from child to adult
adolescence
the stage which the reproductive organs mature and the person a becomes physically able to reproduce
puberty
the man hormone produces by the testes
testosterone
female gonads
ovaries
primary female reproductive hormones
estrogens
a hollow muscular organ in the lower abdomen
uterus
fertilization
conception
38-40 week period from conception to birth
gestation
unborn child
embryo
from the ninth week of development until birth
fetus
protects the child as he develops
amniotic fluid