The left and right side of the heart are separated by the posterior interventricular sulcus. The right side of your heart receives blood from the body and pumps it to the lungs. The left side of the heart does the exact opposite and receives blood from the lungs and pumps it out to the body. The Cardiovascular System works with the body’s Circulatory System and is responsible for distributing blood and nutrients throughout the body to maintain homeostasis. It then helps to pump blood around the body, to supply tissues with oxygen and nutrients and to transport waste products away from the tissues.
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.
| | | Lesson 6 - The Cardio-Respiratory System DefinitionsThe cardio-respiratory system consists of the cardio vascular system (heart and blood vessels) together with respiratory system (lungs and air ways). These systems work to transport oxygen to the muscles and organs of the body and remove waste products including carbon dioxide. The HeartThe heart is a double pump. "Oxygen-poor" blood enters the heart from the vena cava to the right atrium, and flows down to the right ventricle. The first pump pumps "oxygen poor" blood to the lungs from the right ventricle of the heart via the pulmonary artery where it returns as "oxygen rich blood" via the pulmonary vein to the left atrium.
2. . The P wave of a normal electrocardiogram indicates: F. A. Atrial depolarization G. B. Ventricular depolarization H. C. Atrial repolarization I. D. Ventricular repolarization J. E. Tachycardia 3. . Blood in the pulmonary veins enters: K. A. Right atrium L. B. Left atrium M. C. Right ventricle N. D. Left ventricle O. E. Lung 4. .
GAS EXCHANGE All living organisms respire; it’s a process where organisms obtain energy by reacting oxygen with glucose to give water, carbon dioxide and ATP (Adenosine Triphosphate). Respiration includes several cycles that provide a platform of gas exchange. Gas exchange is a biological process where gases get diffused across a concentration gradient from high to low concentrations. Breathing is the process that moves air in and out of the lungs or oxygen through other breathing organs such as gills. I will be looking at Mammals, Insects and Fish’s respiratory systems and how gas exchange occurs in each organism.
The human heart pumps blood through the arteries, which connect to smaller arterioles and then smaller capillaries. In this assignment, we will discuss the arterial blood pressure from several aspects, include definition, normal values for blood pressure, the most important factors affecting it, the mechanism involved in arterial blood pressure regulation, and the relevance between the pressure and the eye. Definition of blood pressure, it’s Normal value, and the factors that determine arterial blood pressure under physiologic conditions. Blood pressure refers to the force exerted by the blood against the inner walls of the blood vessels . This pressure produces when the heart contracts during the heartbeat cycle, which forces blood out
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 remaining blood is carried out of the glomerulus through the efferent arteriole. The fluid absorbed into Bowman's capsule passes through a number of tubules and, as it does so, some constituents are reabsorbed into the blood, while some waste products in the blood are forced into the fluid. In order, from Bowman's capsule, the tubules of the nephron are called the proximal convoluted tubule, the
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'.
Small molecules such as oxygen and carbon dioxide can diffuse in and out of the cells through the phospholipid bilayer; ions and glucose molecules enter and leave the cell via the channel proteins. Waste products such as nitrogenous compounds are carried to the kidneys and are excreted in the form of urine. Antidiuretic hormone, (ADH), is a hormone secreted by the pituitary gland. It is carried by the plasma to the kidney and stimulate the occurrence of water reabsorption. When the body is dehydrated, ADH is released, causing the collecting ducts to become more permeable.
We replenish our own blood supply every time we drink a glass of water. Even though plasma is a pale, yellowish liquid, blood is red because it is thronged with red blood cells (erythrocytes). Each red blood cell holds rough 250 million molecules of the protein hemoglobin. Hemoglobin molecules contain iron atoms that bind loosely to molecules of oxygen as blood passes through the oxygen-rich tissues of the lungs. Lacking a nucleus or most other organelles, red blood cells only last about 120 days before dying at a rate of about 2 million per second.