Heart

A Watch the video and number the terms in the order they are mentioned for the first time:

__ Brachiocephalic         ……………………………………………………………………………………………………………

__ Papillary muscles      ……………………………………………………………………………………………………………

__ Pulmonary artery     …………………………………………………………………………………………………………..

__ Cordae tendinae       …………………………………………………………………………………………………………..

__ Pulmonary vein         …………………………………………………………………………………………………………..

__ Aorta                             …………………………………………………………………………………………………………..

__ Tricuspid valve           …………………………………………………………………………………………………………..

__ Bicuspid (mitral) valve ……………………………………………………………………………………………………….

__ Superior vena cava  ………………………………………………………………………………………………………….

__ Septum                         ………………………………………………………………………………………………………….


B Now, label the heart:

C  Complete the gaps with only ONE most suitable word:

                                       Cardiovascular system

The _________ (1) important muscle in the body is the heart. Without the heart and its
cardiovascular (circulatory) system, human life _________ (2) not be possible. The heart is roughly
the _________ (3) of a fist. It contracts _________ (4) an average rate of 72 times per minute or
nearly 38,000,000 times _________ (5) year. These rhythmic contractions are _________ (6) the pulse
rate and can _________ (7) felt in the radial artery of the wrist.

The human heart consists of four _________ (8), two atria (or auricles) and two _________ (9). Each
is made _________ (10) of several layers of cardiac muscle arranged in circles and spirals. During
the contraction phase, called the systole, oxygenated blood _________ (11) pumped out of the left
part of the heart into the aorta and from there through the arteries to all organs of the body.
Carbon _________ (12), a waste product of this process, is collected in the blood. The blood is
passed back to the right atrium through the _________ (13), where the deoxygenated blood is led to
the heart, and the vena cava during the ________ (14) (or relaxation) period of the heart. From
there, it is pumped into the right part of the heart and to the pulmonary artery to be sent to the
lungs, where CO[2] is removed and oxygen is added.

The rest of the system consists of _________ (15) (small arteries), venules, and capillaries, the
smallest of blood _________ (16). In total, _________ (17) are more than 70,000 miles of them in
the human body.

The blood is made up of two parts - plasma and blood _________ (18). The plasma is a clear,
yellowish liquid _________ (19) transports the 25 trillion erythrocytes and the many fewer white
cells (_________ (20)). The white cells are important _________ (21) fighting disease. _________
(22) in the blood permit clotting to take place at the site of a wound, thus preventing excessive
bleeding.