animal bio - 5
Terms in this set (49)
Movement of molecules from an area of higher concentration to an area of lower concentration.
open circulatory system
A circulatory system that allows the blood to flow out of the blood vessels and into various body cavities so that the cells are in direct contact with the blood
closed circulatory system
A circulatory system in which the oxygen-carrying blood cells never leave the blood vessels
In invertebrates with an open circulatory system, the body fluid that bathes tissues.
carries blood to the lungs for gas exchange and returns it to the heart
Circuit of blood that carries blood between the heart and the rest of the body.
A blood vessel that carries blood away from the heart
A blood vessel that carries blood back to the heart.
A tiny blood vessel where substances are exchanged between the blood and the body cells.
upper chamber of the heart
lower chamber of the heart
Valves located between the atrial and ventricular chambers on each side of the heart, prevent backflow into the atria when the ventricles are contracting.
pulmonary and aortic valves located between the right ventricle and the pulmonary artery and between the left ventricle and the aorta
the blood vessel that takes blood from the heart to the lungs; the blood vessels that take blood from the lungs to the heart
The aorta is this type of artery
Relaxation of the heart
Largest artery in the body
inferior vena cava
A vein that is the largest vein in the human body and returns blood to the right atrium of the heart from bodily parts below the diaphragm.
superior vena cava
A vein that is the second largest vein in the human body and returns blood to the right atrium of the heart from the upper half of the body.
Rings of smooth muscle at the junction between arterioles and capillaries, which can dilate or constrict to control blood flow through the capillary bed
red blood cells
white blood cells
Liquid part of blood
organs that exchange oxygen and carbon dioxide with water
upper part of the trachea contains vocal chords - 3 bands of tissue stretched across the opening of trachea
one of the two tubes that connect the lungs with the trachea
Airways in the lungs that lead from the bronchi to the alveoli.
air sac in the lung
An iron-containing protein in red blood cells that reversibly binds oxygen.
3 basic components that all animals have in their circulatory system
circulatory fluid, interconnecting vessels, muscular pump
example of a hemolymph
mammals and birds have
double circulation, pulmonary and systemic
the innermost layer of arteries is composed of
undirectional valves that prevent the blood from flowing backward are found in the
all gas exchange between air and blood in mammals occurs across the walls if the
exchange of materials between blood and interstitial fluid at the capillaries is aided by
thin walls and low blood velocity
speed of blood flow
3 layers of capillaries
connective tissue, smooth muscle, endothelium
the increase in the area in capillaries causes
pressure drop off and the blood doesnt get repressurized until it returns to the heart
what is the only point in the circulatory system where the blood is pressurized
contraction sequence of the heart
ventricular diastole, atrial systole, atrial diastole, ventricular systole