순환계 Circulation Chapter 33 Circulatory System

소개글

순환계 Circulation Chapter 33 Circulatory System에 대한 보고서 자료입니다.

목차

Circulatory System
Vertebrate Systems
Blood Flow in Fishes
Blood Flow in Amphibians
Blood Flow in Birds and Mammals
Velocity of Flow Varies
Flow Analogy
Functions of Blood
Blood Volume and Composition

본문내용

ses excessive ultrafiltration and results in edema
The Venous System
· Blood flows from capillaries into venules, then on to veins
· Veins are large-diameter vessels with some smooth muscle in wall
· Valves in some veins prevent blood from flowing backward
Hemostasis(지혈)
· Blood vessel spasm, platelet plug formation, blood coagulation
· Clotting mechanism
­ Prothrombin is converted to thrombin
­ Fibrinogen is converted to fibrin
­ Fibrin forms net that entangles cells and platelets
Hypertension(고혈압)
· Blood pressure above 140/90
· Tends to be genetic
· May also be influenced by diet
· Contributes to atherosclerosis(동맥경화증)
· “Silent killer” - Few outward signs
Atherosclerosis
· Arteries thicken, lose elasticity, and fill up with cholesterol and lipids
· High LDL level increases risk of atherosclerosis
Arrhythmias(부정맥)
· Bradycardia(서맥) - slow heart rate
· Tachycardia(심박급속증) - 100+ beats/minute
· Atrial fibrillation(심방세동) - irregular heartbeat
· Ventricular fibrillation - uncontrolled contraction of ventricles; quickly fatal
ECG Recordings
Risk Factors for Cardiovascular Disease
· Smoking· Gender (maleness)
· Genetic factors· Old age
· High cholesterol
· Obesity
· Lack of exercise
· Diabetes mellitus
Lymphatic System
· The circulatory system is leaky
· Some fluid is forced out of the smallest vessels and into the interstitial fluid
· Vessels of the lymphatic system pick up this fluid, filter it, and return it to the circulatory system
Lymphatic System
Lymph Vascular System
· Fluid enters lymph capillaries
· Capillaries merge into lymph vessels
· Lymph vessels converge into ducts that funnel fluid into veins in the lower neck
Lymph Nodes
· Located at intervals along lymph vessels
· Act as a filter for lymph
· Contain lymphocytes that can recognize a foreign invader

키워드

순환,   동물의 순환계,   순환계,   혈액 순환,   Circulation