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perennial, specialized cells, epithelial cells, Connective Tissue, nervous tissue, muscle tissue, homeostasis, feedback inhibition, neuron, synapse, neurotransmitter, meninges, celebellum, hypothalamus, pupil


flowering plant that lives for more than two years

Specialized Cells

cells uniquely suited to perform a particular function

Epithelial Cells

skin cells that cover the external body surface and line the internal surfaces of organs

Nervous Tissue

tissue that receives messages from the body's external and internal environment, analyzes the data, and directs the response

Muscle Tissue

tissue that controls the internal movement of materials in the body, as well as external movement


process by which organisms maintain a relatively stable internal environment

Feedback Inhibition

process in which the product or result stops or limits the process


cell that carries messages throughout the nervous system


location at which a neuron can transfer an impulse to another cell


chemical used by a neuron to transmit an impulse across a synapse to another cell


three layers of connective tissue in which the brain and spinal cord are wrapped


region of the brain that coordinates body movements


brain structure that acts as a control center for recognition and analysis of hunger, thirst, fatigue, anger, and body temperature


small opening in the center of the iris

Connective tissue

tissue that holds organs in place and binds different parts of the body together

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