ch 21 Flashcards
whats cells of the same type workign together called
tissues
what is different tissues working together
prgan
what is different organ working together
systems
systems work together
is organism
what are the four differnt types of tissue
epithileal connective, nervous, muscle tissue
what is all ecosystem
biosphere
what do epithileal tissues do
makes secretions
what is the shape of epithilial
fried egg shaped
what do muscle tissues do desription
long thin and flexible,
what do nervous system tissue do
communicate and control things
what is bone to muscle called
tendon
what protein makes up connnective tissue
collagen
what is bone to bone tissue
ligaments
what does endocrin system do
hormones
whats the excratory system
the kidney and lungs
whats the intugamentary system
the skin
what is the lyphatic system
keeps body fluid levels in balance and defends the body against infections.
what is homeostasis
the process by which living organisms maintain a stable internal environment, even when external conditions change
what is negative feedback
it maintains stability in a system, if you get too cold it tells your body to heat up vice versa
what is positive feedback
the oppostie of slowing down instead it goes faster and faster. like healing.
which brain part senses temperature and tells your body to start or stop heat/cool
hypothalamus
epidermis
Acts as a protective barrier
dermis
protecting your body from the outside world, supporting your epidermis, feeling different sensations and producing sweat.
hypodermis
insulating your body, protecting your body from harm, storing energy and connecting your skin to your muscles and bones.
what are the two main parts of the skin
epidermis and dermis
what is not part of the skin in dermis epidermis and hypodermis
hypodermis
how many layers are in the epidermis
5
what happens at the bottom of the epidermis layers
mitosis
whats teh coily thing in the dermis
sweat gland
what does the sweat go through (2 things)
aweat duct, then sweat pore
what does the sebacious gland make
cbum
what does the oily substance do to hair(cbum)
conditions it and stuff
when the botoom of hair pulls over and hair stands up and there is a bulge and compression in two differnt spots what is that called
a goosebump
is hair out of your skin dead or living
dead the root inside is living
why do you want hair to stand up when its cold
it traps heat
what are the cells that make melanin called
melanocytes
what does melanin do for you to protect you
absorbs UV light
what is vitamin D needed for
building and maintaining healthy bones
wht is the the thing that happens to your legs when you dont have enough Vitamin D
rickets
what is the name of the muscles in our skin
arrector pili
pathogen
bactieria or virus that can cause disease
