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Circulation: The Heart
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15
Science
7th Grade
05/17/2011

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Term
Closed system
Definition
a transport system where there are no exits or entrances. The circulatory system is a closed system.
Term
Ventricles
Definition
lower chambers of both sides of the heart
Term
Alveoli
Definition
small sacs at the end of bronchial tree where oxygen and carbon dioxide are exchanged in the blood
Term
4 chambers
Definition
The heart as 4 chambers (rooms), 2 atria and 2 ventricles.
Term
Atrium
Definition
The upper chambers of both sides of the heart
Term
Hub
Definition
The heart is a "hub" or center of the circulatory system.
Term
Capillaries
Definition
The smallest, thinnest blood vessels in the body where oxygen and carbon dioxide are exchanged with every cell of the body
Term
Bigger to smaller vessels
Definition
the blood moves from bigger to smaller vessels when it travels to individual cells or to the lungs
Term
Smaller to bigger vessels
Definition
The blood moves from smaller to larger vessels when it moves from individual cells back to the heart
Term
Two pumps
Definition
There are two sides of the heart that act a pumps, left and right. Each side has an atrium and ventricle.
Term
one-way street
Definition
The direction of blood flow in the vessels and heart, controlled by valves. (blood flows in one direction)
Term
raw materials for cellular respiration
Definition
glucose, oxygen
Term
products of cellular respiration
Definition
water, CO2 and heat
Term
waste products of cellular respiration
Definition
carbon dioxide, heat, water
Term
Cellular Respiration recipe
Definition
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