The myocardium is the middle layer and is the muscle tissue and majority of the heart. The myocardium is what causes the heart to contract. The heart consists of four heart chambers which receive the blood that circulates through our body. The two main chambers are the right atria and the left atria and the two other chambers are called the right ventricle and the left ventricle. The atria deliver blood the ventricles.
17. What does the portal vein drain? The portal vein drains blood from the pancreas, spleen, and the digestive organs. 18. What is the function of the dorsalis pedis artery?
There are three components which make up the Cardiovascular System. These are the heart, blood vessels and blood. The heart consists of four chambers: the right and left atrium and the right and left ventricle. The top chambers are connected to the bottom chambers by valves and are separated by the coronary sulcus. The left and right side of the heart are separated by the posterior interventricular sulcus.
Each renal artery enters its respective kidney at the renal hilus and divides into interlobar arteries. These arteries divide into smaller arcuate arteries and interlobular arteries. The smallest branches of the interlobular arteries are the afferent arterioles which carry blood into the glomerulus a knot of capillaries at the core of each nephron. The afferent arterioles are also lined with juxtaglomerular cells which help to control blood pressure.Each glomerulus is surrounded by a cup-shaped structure call Bowman's capsule. The blood pressure in the glomerulus is high enough that about 10% of the blood fluid volume is squeezed out and absorbed by the Bowman's capsule.
The heart's muscle wall is called the myocardium. Oxygen for the heart muscle itself is provided by blood vessels wrapped around the surface of the heart, not the blood flowing through it. | The Heart | | The Lungs DefinitionsThe total lung capacity is approximately 5 litres - this is the maximum amount of air the lungs can contain. The tidal volume is the volume of air breathed in and exhaled during normal breathing and is approximately 500 ml.Residual volume is the volume of the air remaining in the lungs after the maximum amount has been exhaled. It is around 1.5l.
A. While the ventricle is in diastole c. B. By the movement of blood from atrium to ventricle d. C. While atrium is contracting e. D. When the ventricle is in systole f. E. During all of the above Match the following A. A. Myocardium B.
It supplies blood to all parts of the body with the exception of the lungs. The aorta ascends from the heart and forms an arch, from which arise two subclavian arteries. Each subclavian has two main branches, the common carotid and the vertebral. Both of these carry blood to the brain. Each common carotid divides into an external carotid artery, which supplies blood to the face and an internal carotid artery, which supplies the brain with blood.
Circulatory system – *Well developed having four-chambered heart-sinus venosus, auricle, ventricle and conus arteriosus. *The sinus venosus open into auricle by sinu-auricular aperture. *Auricle divided by perforated inter-auricular septum (Fig. 11.4). Due to perforated inter-auricular septum blood in the auricle is mixed blood.
The pressure at which blood is pumped around the body by the heart is called blood pressure. The blood pressure of a person is always expressed in the form of two values called 'systolic pressure' and 'diastolic pressure'. In order to understand this, we should first know the meaning of 'systole' and 'diastole'. The phase of the heart beat when the heart contracts and pumps the blood into arteries is called 'systole'. And the phase of heart beat when the heart relaxes (or expands) and allows the chambers to fill with blood is called 'diastole'.
The Trachea continues to divide inside the lungs forming narrower tubes called the Bronchioles. In each end of these Bronchioles are groups of alveoli (air sacs). It is in the Alveoli where gas exchange actually occurs. Oxygen can either enter through the nose or in the mouth. When we inhale, the oxygen enters through our nose or mouth then it gathers it in the Pharynx (throat) then it is passed down in the trachea then it flows down your bronchioles and finally down the alveoli.