What is mediastinum?
loc of heart. Space between lungs and diaphragm
3 Layers of heart
Pericardium - surrounds heart, lubes
Myocardium - myo of heart, contracts heart
Endocardium - inner lining of heart
2 Atrium L & R
2 Valves L & R
Upper Heart
Lower Heart
Bicuspid Valve
located L Atrium, L Ventricle of heart
Tricuspid Valve
located R Atrium, R Ventricle of heart
Aorta
largest blood vessel, oxygen/nutrient rich blood heart
Pulmonary Trunk
artery carries blood to lungs to release Carbon & intake oxygen
Superior Vena Cava
vein returns de-oxygenated blood to R atrium from upper extremities
Inferior Vena Cava
vein returns de-oxygenated blood to R atrium from lower extremities
Pulmonary Veins/Arteries
4 Veins, 2 from lungs that take oxygen from lungs to L atrium
Coronary Veins/Arteries
base of aorta, supply heart myo oxygenated blood
Sino-atrial Nodes
upper part R Atrium of heart, bundle of neurons. "pacemaker", heart beater
Systole (BP S/D)
blood pressure, heart contracting, max arterial pressure
Diastole (BP S/D)
heart, period of relaxation & dilation
Order of blood vessels largest to smallest
aorta, pulmonary trunk, arteries, arterioles, capillaries
What helps to assist the venous return of blood
Valves in the veins which stop blood flowing backwards, As the myos around the veins contract they squeeze the veins, therefore forcing blood back to the heart
Blood Pressure Range: Newborn
90/60
Blood Pressure Range: Teenager
120/60
Blood Pressure Range: Healthy/Young Adult
120/80
Blood Pressure Range: HYPOtension
100/60
Blood Pressure Range: HYPERtension
140/90
Red Blood Cells
90% of blood, transports oxygen to cells and carbon dioxide away from cells. In chest, vert., pelvis.
White Blood Cells
Lack hemoglobin, 1 to 500 ratio. Protects from pathogens, removes dead cells & substances
Plasma
55% of blood in body, blood in lymph, 90% water, rest is gases, nutrients and waste products. Moves water between tissues and blood.