Circulatory System - Functions in transport (gases, nutrients and wastes); regulation (ions, pH, and hormones); and protection (immune).
Arteries - Carry blood away from the heart.
Veins - Carry blood back to the heart.
Capillaries - Are very tiny and thin-walled, where the exchange of gases and nutrients between the blood vessels and body tissues occurs.
Pulmonary system - Connects the heart and lungs.
Systemic system - Connects the heart with all of the tissues of the body.
Plasma - 55% of blood, mostly water with proteins, salts, gases dissolved in it.
Erythrocytes - RBC - Most of 45% cellular part. Transport oxygen from the lungs and CO2 to the lungs. Humans have around 30 trillion RBC's in our blood supply.
Hemoglobin - A respiratory pigment that gives the RBC's their red color. Carries the O2 & CO2 molecules.
Leukocytes - WBC - Help defend the body from disease. We have 1 for every 700 RBC.
Macrophage - A type of WBC that is a kills foreign invaders.
Platelet - Cellular fragments that aid in blood clotting. We have about 1 for every 16 RBC.
Coronary arteries - Supply freshly oxygenated blood directly to the heart.
Heart rate - The number of beats/min (at rest is about 72 beats per minute).
Cardiac output - The volume of blood pumped by the heart in 1 minute. For a resting adult cardiac output is 5 - 6 L/min.
Cardiovascular disease - Disease of the heart or blood vessels. Causes 50% of all deaths in the US
Blood pressure 120/80 - Actual pressure of blood in an artery.
Hypertension - high blood pressure, can lead to a stroke or heart attack. Hypertension in males and females is 140/90.
Systolic pressure 120 - The top number. This is the time when the 2 ventricles contract and push fresh blood out of the heart.
Diastolic pressure 80 - The bottom number. It is the relaxation time (lowest pressure) between successive contractions of the heart.
Lymphatic system - Returns interstitial fluid (leaked fluid) to the blood.
Interstitial fluid - fluid (plasma) forced by pressure out of the capillaries and bathes the tissues of the body with gasses amd nutrients.
Large Veins from Body --> Right Atrium --> Right Ventricle --> Pulmonary Artery (Only Artery with Deoxygenated Blood) --> Lungs --> Pulmonary Veins (Only Veins with Oxygenated Blood) --> Left Atrium --> Left Ventricle --> Aorta to Body.