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Ch. 23 Vocab
ch. 23 vocab
21
Science
8th Grade
10/30/2013

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Term
Cardiovascular System
Definition
A collection of organs that transport blood to and from your body's cells; the organs in this system include the heart, the arteries, and the veins.
Term
Blood
Definition
A connective tissue made up of platelets, white blood cells, red blood cells, and plasma.
Term
Arteries
Definition
Blood vessels that carry blood away from the heart.
Term
Capillaries
Definition
The smallest blood vessel.
Term
Veins
Definition
Blood vessels that direct blood to the heart.
Term
Pulmonary Circulation
Definition
The circulation of blood between the lungs and the heart.
Term
Systemic Circulation
Definition
The circulation of blood between the heart and the body.
Term
Blood pressure
Definition
The amount of force exerted by blood on the inside walls of the blood vessel.
Term
Lymphatic System
Definition
A collection of organs that collect extracellular fluid and return it to the blood; the organs in this system include the lymph nodes and the lymphatic vessels.
Term
Lymph
Definition
The fluid and particles absorbed into lymph capillaries.
Term
Lymph Nodes
Definition
Small, bean-shaped organs that contain small fibers that work like nets to remove particles from the lymph.
Term
Thymus
Definition
A lymph organ that produces lymphocytes.
Term
Spleen
Definition
An organ that filters blood and produces lyphocytes.
Term
Tonsils
Definition
Small masses of soft tissue located at the back of the nasal cavity, on the inside of the throat, and at the back of the tongue.
Term
Respiration
Definition
The exchange of gases between living cells and their environment; includes breathing and cellular respiration.
Term
Respiratory System
Definition
A collection of organs whose primary function is to take in oxygen and expel carbon dioxide; the organs of this system includes the lung, the throat, and the passage ways that lead to the lungs.
Term
Pharynx
Definition
The upper portion of the throat.
Term
Larynx
Definition
The area of the throat that contains the vacal cords.
Term
Trachea
Definition
The air passageway from the larynx to the lungs.
Term
Bronchi
Definition
The two tubes that connect the kungs with the trachea.
Term
Alveoli
Definition
Tiny sacs that form the bronchiole braches of the lungs.
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