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Unit 19: Biology Part 2 Page 14 of 137

Nutrition Facts - The label on packaged food that shows the nutrients in the
food.

Oil glands- Skin organ that secretes an oily substance, called sebum, into
the hair follicle.

Organ – A group of tissues working together

Organ – Group of specialized cells working together

Organ- A structure made of two or more tissues that work together.

Organ System – A group of organs working together

Organ System – Group of organs working together

Organ system- A group of organs that work together.

Organelle – Small structure inside a cell

Parasympathetic Division – Division of the autonomic nervous system that
controls involuntary motion under normal circumstances

Partly movable joints- Joints which can only move in one direction; for
example, elbows.

Pathogen – Something that causes disease

Pathogen – Substance capable of causing infection or disease

Periosteum- Tough, shiny, white membrane that covers all surfaces of
bones.

Peripheral Nervous System (PNS) – Part of the nervous system consisting of
all the nerve cells outside the CNS

Peristalsis - The wave-like movement of the intestinal muscles used to move
food from the esophagus to the anus.

Phagocyte – White blood cell that engulfs and destroys pathogens and debris

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