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19 Cards in this Set
- Front
- Back
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Marrow |
The porous inner core of bones, where blood cells are produced |
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Axial Skeleton |
Made of bones that keep the body upright, including the cranium, the vertebrate, the rib cage, the sternum, and the pelvis |
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Appendicular Skeleton |
Includes the bones of the appendages and the bones where these attach to the axial skeleton |
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Central Nervous System (CNS) |
Includes the brain and spinal cord |
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Peripheral Nervous System (PNS) |
Consists of nerves and sensory receptors |
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Neurons |
Cells that send messages throughout the body in the form of electrical energy |
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Axon |
A long extension of a neuron that transmits messages |
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Dendrites |
Short, branched extensions of a neuron that receive messages from other cells |
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Synapse |
a gap between the axon of one neuron and the dendrites of another neuron |
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myelin sheath |
acts as a protective layer around axons
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brain stem |
at the base of the brain and connects with the spinal cord--is the portion of the brain that controls reflexes and involuntary mechanisms such as respiration, heartbeat, and swallowing |
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cerebellum |
the part of the brain that keeps track of the position of the body |
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cerebrum |
the part of the brain that controls all thought and other voluntary acts and detects sounds, smells, sight, taste, pain, heat, and cold
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cornea |
a transparent layer of cells through which light can travel into the eye |
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iris |
the colored part of the eye--lies just behind the cornea |
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pupil |
the opening in the center of the eye through which light enters |
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retina |
the back lining of the eye, on which visual images are focused |
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rod cells |
light-sensitive cells used in non-color vision and low-light situations |
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cone cells |
light-sensitive cells used for color vision and fine detail |
