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Chapter 23 vocab
Chapter 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 inthis 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 vessels
Term
veins
Definition
blood vessels that direct blood to the heart
Term
pulmonary circulation
Definition

a circulation of blood between that heart and lungs

Term
systemic circulation
Definition
the circulation of blood between the heart and the body (excluding the lungs)
Term
blood pressure
Definition
the amount of force exerted by blood on the inside walls of a blod 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 lymphatic vessels
Term
lymph
Definition
the fluid and particles absobed 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 lymphocytes
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 your 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 include lungs, the throat, and the passageways theat lead to the lungs
Term
pharynx
Definition
the upper portion of the throat
Term
larnx
Definition
the area of the throat that contains the vocal cords
Term
trachea
Definition
the air passageway from the larynx to the lungs
Term
bronchi
Definition
the two tubes that connect the lungs with the trachea
Term
alveoli
Definition
tiny sacs that form the bronchiole branches of the lungs
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