Skin System
Two main layers of skin
Epidermis & dermis
Number of bones in adult
~200
Muscle type used for movement
skeletal
Basic unit of nervous system
Neuron(nerve cell)
Chemical messengers in the body are called
hormones
Main job of skin
Protect body & regulate temperature
Function of skeleton
Support and protect
Muscle type in organs
smooth
Job of spinal cord
Sends messages
Controls other glands
pituitary gland
Where hair is NOT found
Palms, soles, lips
Bones that protect brain
skull
Muscle type found in heart
cardiac
Controls center of the entire nervous system
brain
Links nervous and endocrine systems
hypothalamus
Protein in hair is called
Keratin
Bones in axial skeleton
skull, ribs, backbone, sternum
Why muscles work in pairs
they can only pull
Two parts of nervous system
CNS and PNS
How hormones are regulated
Negative feedback
How does hair grow
From follicles; cells divide and push upward
Difference between axial and appendicular
Axial = center, Appendicular = limbs/or attach
How muscles contract
Signals from brain + filaments slide
Function of cerebrum
Thinking, memory, senses
Adrenal gland function(what does it do)
flight or fight