excretory
tear and grind food
teeth
receives and sends signals to other neurons
neuron
maintaining a stable internal enviroment
homeostasis
a small segment of DNA that codes for proteins
gene
increases surface area
villi
chemical messengers
hormones
main processing center
brain
nucleotides
pair of nitrogenous bases
adenine
thymine
filters toxins
produces bile
liver
produces and releases chemicals into the bloodstream
glands
receive sensory input
sensory neuron
5-carbon sugar
phophate group
nitrogenous base
parts of a nucleotide
pair of nitrogenous bases
guanine
cytosine
storage sack for food
stomach
An electrical signal that travels
nerve impulses
conducts impulses between the brain and the rest of the body
spinal cord
provides support
sugar-phosphate group
making a copy of DNA
DNA replication
produces enzymes
pancreas
transmit signals between neurons at the synapse
neurotransmitters
allows us to move
motor neuron
shape of DNA
double helix
Why do cells need to replicate themselves
to make more cells