vocab
Vocab. Ch. 37
Section 1
Myocardium- thick layer of muscle, in the walls of the heart, that the epithelial, and connective tissue form a sandwich around
Atrium- the upper chamber of the heart, which receives the blood
Ventricle – the lower chamber of the heart., which pumps blood out of the heart
pulmonary circulation – when the right side of the heart pumps blood from the heart into the lungs
systemic circulation- when oxygen rich blood flows into the left side of the heart and is pumped to rest of the body
Pacemaker – the two networks of muscle fiber in the heart, one in the atria and the other in the ventricles. These muscles “set the pace” for the heart as a whole.
Aorta – when the blood, rich in oxygen, leaves the left side of the heart it flows into this blood vessel. It is the first of the series of blood vessels that circulate the blood through out the body.
Arteries – large vessels that carry blood from the heart to the tissues of the body
Capillaries – the smallest of the blood vessels
Veins – after blood moves through the capillaries it is their job to move it back to the heart
Arteriosclerosis – when fatty deposits called plaque build up on the walls of arteries
Valve – flaps of connective tissues between the atria and the ventricles.
Section 2
Plasma – a straw colored fluid, which the cells in the blood are suspended in.
Hemoglobin – iron-containing protein that binds the oxygen in the lungs and transports it to the tissues throughout the body where the oxygen is released
Phagocytes – (“eating cells”) they engulf and digest foreign cells
platelet – fragments of cytoplasm enclosed in a piece of cell membrane and released into the blood stream.
Lymph – the fluid that the network of vessels called the lymphatic system collects when it is lost by the blood and returns it to the circulatory system.
Section 3
Pharynx – serves as a pathway for both air and food.
Trachea – wind pipe
Bronchi – from the larynx, air passes through the trachea into these two large passageways in the chest cavity
alveoli – millions of tiny air sacs that the bronchi reach after a continuation of subdividing . the alveoli are dead end cells
Diaphragm – at the bottom of the cavity a large, flat muscle. As you breathe in or out it contracts and expand the volume pf the chest cavity
Nicotine – a stimulant drug that increases the heart rate and blood pressure
emphysema – loss of elasticity in the tissue of the lungs
Larynx – contains two highly elastic folds of tissues known as vocal cords
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