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Unit 19: Biology Part 2 Page 11 of 137

Heart Attack – The complete blockage of a coronary artery

Hemoglobin – Oxygen-carrying protein

hereditary – able to be passed on from parents to children

Hinge joints- Joint structure in which the ends of bones are shaped in a way
that allows motion in two directions only (forward and backward); examples
include the knees and elbows.

Homeostasis- The ability of the body to maintain a stable internal
environment in the response to external changes.

Hormones - Regulatory molecules used in many bodily processes, including
digestion.

Hyperopia – Vision disorder in which light is focused behind the retina

Hypertension – Disease in which a person always has high blood pressure

Hypodermis- Fatty layer of tissue that lies under the dermis, but is not part
of the skin. Also called the subcutaneous tissue.

Ileum - The third part of the small intestine; covered with villi; the few
remaining nutrients are absorbed in the ileum.

Immune Response – Reaction of the body when a pathogen enters

Infectious – Able to be spread from one person to another

Inflammation – Reaction to infection involving increased blood flow

Ingredients - A specific item that a food contains.

inhalation –movement of air into the body

Insoluble fiber - Large, complex carbohydrate; does not dissolve in water;
moves through the large intestine and helps keep food waste moist so it can
pass easily out of the body.

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