Veins.These blood vessels take blood back to the heart; this blood lacks oxygen (oxygen-poor) and is rich in waste products that are to be excreted or removed from the body. Veins become larger and larger as they get closer to the heart. The superior vena cava is the large vein that ...
Looking at the outside of the heart, you can see that the heart is made of muscle. The strong muscular walls contract (squeeze), pumping blood to the arteries. The major blood vessels connected to your heart are the aorta, the superior vena cava, the inferior vena cava, the pulmonary ar...
the thoracic aorta 胸主动脉 the pulmonary artery 肺动脉 the coronary circuit 冠脉循环 atria 心房【复数】 right atrium 右心房【单数】 left atrium 左心房 【单数】 the superior vena cava 上腔静脉 the right brachiocephalic vein 头臂静脉 the azygos vein 奇静脉 the inferior vena cava 下腔静脉 the ...
The heart has four chambers – two superioratriaand two inferiorventricles. The internal partition that divides the heart longitudinally is called theinteratrial septumwhere it separates the atria, and theinterventricular septumwhere is separates the ventricles. The right ventricle forms most of the ante...
The heart, although a single organ, can be considered as two pumps thatpropelblood through two different circuits. The right atrium receives venous blood from thehead, chest, and arms via the largeveincalled the superiorvena cavaand receives blood from theabdomen, pelvic region, and legs via ...
The heart consists of four cavities, separated from each other by walls and valves. The blood enters the heart in the right atrium via the superior vena cava (upper part of the body) and the inferior vena cava (lower part of the body). Both vessels have no valves. The wall of the ...
take the blood to the lungs. Thepulmonary veinstake blood from the lungs to the left atrium. All the other veins in our body drain into theinferior vena cava (IVC)or thesuperior vena cava (SVC). These two large veins then take the blood from the rest of the body into the right ...
The right atrium receives deoxygenated blood from the body through veins called the superior and inferior vena cava (the largest veins in the body). The right atrium contracts and blood passes to the right ventricle.Once the right ventricle is full, it contracts and pumps the blood through to...
Figure 9.6: External Anatomy of the Heart Layers The wall of the heart is composed of three layers of unequal thickness. From superficial to deep, these are the epicardium, the myocardium, and the endocardium. The outermost layer of the wall of the heart is also the innermost layer of the...
through the superior or inferior vena cava, and moves through the tricuspid valve into the right ventricle of the heart during diastole. The tricuspid valve closes during the systolic phase, and blood is funneled through the pulmonic valve into the pulmonary circulation. Blood will become oxygenate...