structures blood flows from arterioles to sinusoids to venules. The artery wall consists of three layers; •Tunica Adventitia - the strong outer covering of arteries and veins. It is composed of connective tissue as well as collagen and elastic fibres. These fibres allow the arteries and veins to stretch to prevent overexpansion due to the pressure that is exerted on the walls by blood flow. •Tunica Media - the middle layer of the walls of arteries and veins. It is composed of smooth muscle and elastic
veins, arteries, and lymph. They are controlled by the autonomic nervous system. Experiment 1: Post-Lab Questions 1. Label each of the items in the following slide pictures based on your observations. A. Tunica Adventia B. Tunica Intima C. Tunica Media D. Lipids E. Tunica Intima F. Tunica Adventia
Atherosclerosis is defined as the formation of fatty plaques in the walls of arteries, restricting blood flow to deep tissues (Martini). Coronary heart disease came in the public eye in the mid-20th century as a disease of pandemic magnitudes and it continues to be a major cause of death in the western world. The fundamental cause of coronary heart disease is Atherosclerosis. The term “atherosclerosis” is the combination of two Greek words which correctly imply the elements of the lesion. The first
The five main types of white blood cells are neutrophils, monocytes, basophils, lymphocytes, and eosinophils. The most common type of white blood cells are neutrophils. Neutrophils do not live very long, usually only up to 10 hours. They die immediately when a foreign substance is ingested and destroyed. Neutrophils make up 50 to 70% of white blood cells. Until they are alerted to an infection, they are in the bloodstream. They are very quick to responding to infections. Netrophils are granulocytes
the tunica media, of the artery. This inflammatory environment releases chemotactic agents and growth factors, prompting the transport and modification of plasma lipids. This event is favorable towards low-density lipoproteins which oxidize within the inflammatory environment, delivering cholesterol to and damaging surrounding cells. Macrophages arrive and uptake the LDL’s, transforming into foam cells which collectively form a fatty streak. Migration of smooth muscle cells from the tunica media
PRACTICAL EXERCISE 4 HEART STRUCTURE AND CIRCULATION Q.1 Describe the heart sounds you hear. Explain the origin of two sounds. Two heart sounds are normally heard through a stethoscope on the chest wall, "lab" "dap". The first sound can be described as soft, but resonant, and longer then the second one. This sound is associated with the closure of AV valves (atrioventricular valves) at the beginning of systole. The second sound is louder and sharp. It is associated with closure of the pulmonary
Sickle cell anemia affects millions of people around the world, with about 70,000 Americans inheriting the disease, and many others carrying the sickle cell trait (Genetics). This disease mostly affects people that have African and Mediterranean roots, mostly because this disease provides protection for people from malaria which kills 3,000 African children daily (Malaria). Malaria is a deadly infectious disease that is transmitted by to humans when mosquitoes sting them (Learn). Sickle cell anemia