Week 1 - Cardiovascular system: Blood Flashcards
Types of blood cells
Red
White
Platelets
RBC
carry oxygen
WBC
defense against infection and disease
Platelets
stops bleeding
creates the scabs
comes from bone marrow
Primary function of blood
deliver oxygen and nutrients
removes wastes from body cells
Other functions of blood
Defense
Heat distribution
maintenance of homeostasis
Maintenance of homeostasis
negative feedback loop
chemical balance
What does the negative feedback loop trigger
opposite response
Composition of blood
Erythrocytes
plasma
Hematocrit
Plasma proteins
Erythrocytes
RBC
comparatively fewer leukocytes & platelets
Plasma
fluid in which RBC, WBC, and platelets are suspended
Hematocrit
% of total sample comprised of erythrocytes
What % of plasma is made up of proteins
~7%
3 major groups of plasma proteins
Albumin
Globulins
Fibrinogen
Albumin
protein made by the liver
albumin levels show your liver and kidney functions
How does RBC transport O2
In the lungs, hemoglobin picks up O2
oxygenated Hb moves to body tissues where it unloads O2
blood becomes dark due to deoxygenation
Oxyhemoglobin
Hemoglobin oxygenated
Deoxyhemoglobin
Deoxygenated hemoglobin
Anemia
Not enough O2
Polycythemia
Having dysregulated O2
Shape and structure of RBC
biconcave discs
shallow centers
optimizes ratio of surface area to volume
enables them to fold up as they move through narrow blood vessels
What is Hemoglobin made up of
protein & iron
Chambers of heart
Right Atrium
Right Ventricle
Left Atrium
Left Ventricle
Circuits in the body
pulmonary
systemic
Right side of heart is for…
Lungs
Left side of heart is for…
system
Arteries
Carry oxygenated blood away from the heart
Veins
Recover deoxygenated blood from body
Sac surrounding heart
Fibrous Pericardium
Serous pericardium
Serous Pericardium
Parietal layer
Visceral layer/epicardium
Beneath sacs surrounding heart
Myocardium
Endocardium
Myocardium
Muscle
Endocardium
thin layer on inner wall
protector/lubricant for myocardium
Internal structures of heart
Septum
Valves
Septum of heart
Wall dividing heart into 4 chambers
Valves
Atrioventricular valve
Aortic valve
pulmonary valve
Atrioventricular valves
Tricuspid
bicuspid/mitral
Cardiac muscle cells
Cardiomyocytes
dependent on aerobic metablolism
Conduction system of heart
Has capability to beat on its own
Components of conduction system
Sinoatrial node
Atrioventricular node
AV bundle
Bundle branches
Purkinje cells
