Veins transport blood to the heart and lungs at low pressure after receiving it from the capillaries. Valves inside the veins keep blood moving in one direction. The human body's arterial system branches out from one main artery, the dorsal aorta. Like veins, arteries have three layers: an outer layer of tissue, an inner layer of epithelial cells and a layer of muscle in between. Arteries deliver oxygenated blood to the capillaries, where the exchange of oxygen and carbon dioxide takes place.
CIRCULATORY SYSTEM 1. INTRODUCTION The circulatory system is also known as the cardiovascular system. This system is a double circulatory closed system which transports blood via arteries, veins and capillaries to the lungs through the pulmonary circulation and to the rest of the body tissues in the systemic circulation. Since the blood travels to varying distances around the body, the blood vessels have to be adapted to overcome different pressures. The pressure changes in the four chambers on the heart (two atria’s and two ventricles) allow the blood to continuously flow in one direction.
Describe the function of the heart, cardiac cycle and circulatory system Function of the heart The heart is a muscular organ that pumps and circulates blood throughout the body via a transport system of arteries and veins and capillaries. As the blood circulates throughout the body it supplies oxygen and nutrients to the tissues as well as removing carbon dioxide and harmful waste products (Tucker, 2015). The structure of arteries Arteries have thick muscular walls and a small lumen passage. According to L. Tucker they are constructed with three layers: • A fibrous outer layer • A middle layer of muscle and elastic tissue • A lining made of squamous epithelial tissue The epithelial lining has a smooth surface to reduce friction and
1. List the structures and functions of the cardiovascular system. Do not forget blood and vessels are part of this system. The cardiovascular consists of the heart, blood vessels and blood. It has three functions one of them is that it transports nutrients, oxygen and hormones to cells throughout the body and removes wastes such as carbon dioxide and nitrogenous waste.
ASG1 A – Anatomy and Physiology 1. Describe the function of the heart, cardiac cycle and circulatory system Function of the heart The heart is a muscular organ that pumps and circulates blood throughout the body via a transport system of arteries and veins and capillaries. As the blood circulates throughout the body it supplies oxygen and nutrients to the tissues as well as removing carbon dioxide and harmful waste products (Tucker, 2015). The structure of arteries Arteries have thick muscular walls and a small lumen passage. According to L. Tucker they are constructed with three layers: • A fibrous outer layer • A middle layer of muscle and elastic tissue • A lining made of squamous epithelial tissue The epithelial lining has a
The heart consists of muscles that pumps blood, arteries that supply blood to the heart muscle, and valves that ensure that the blood within the heart is pumped in correct direction. Problems can arise in any of these areas. Like cardiovascular disease, heart disease is a term that's somewhat loose and broad, and it's often used that way. 5.1 Personal Context: I have come across many patients with heart diseases. Few of those diseases are very critical and life threatening.
These cells make up 60% of of the white blood cells in the blood stream. C. Broken parts of the cells also help the blood circulation. 1. Platelets are small disk-shaped pieces of cells that are broken off from other cells in the bone marrow 2. Platelets help control bleeding in an interesting process call hemostasis 3.
The Cardiovascular System (Known as circulatory system) is an important system within the human body which functions with specific organs such as the heart, blood vessels – including capillaries, veins, and arteries along with small blood vessels, and blood. The cardiovascular system works by your inhaling process. As you inhale, the air goes towards your lungs. Since the air contains oxygen, your blood stream absorbs this through your lungs. The heart forces the ‘oxygenated’ blood through a range of connecting blood vessels specifically speaking arteries which travel around your body providing your cells with the necessary materials that the blood contains.
The blood is a body fluid that circulates constantly. It transports oxygen to the cells by the work of the red blood cells which contain haemoglobin. White blood cells attack, destroy and remove abnormal and old cells and also fight infectious agents and foreign substances. Platelets take part in blood clotting. Plasma which constitutes about 55% of the blood circulates dissolved nutrients
Respiration consists of transportation of oxygen from the atmosphere to the body tissues and the release and carriage of carbon dioxide formed in the tissues to the atmosphere. The human respiratory system is a series of organs responsible for taking in oxygen and expelling carbon dioxide. We can list the primary organs of the respiratory system as nose, pharynx, larynx, trachea, bronchi, and lungs which carry out this exchange of gases as we breathe. During inspiration air passes through respiratory passages due to the pressure differences formed in chest and trunk muscles. The ‘respiratory tract’ consists of these passageways and the lungs.