Lesson 4 Flashcards
(54 cards)
Cardiovascular System
Closed circuit composed of heart, blood vessels and blood
Plasma definition
liquid component of blood responsible for carrying hormones, plasma protein, food materials, ions, gases through body
Blood is transferred through body via….
blood vessels
Arteries and arterioles
carry oxygen-rich blood AWAY from heart
Veins and venules
return oxygen-poor blood TO heart
Capillaries
provide sites for gas, nutrients, waste exchange between blood and tissues
Arteriosclerosis
Commonly seen in elderly
Contributes to arterial rigidity and dec. arteries ability to expand
Causes inc. BP
Pulmonary Circuit
RIGHT SIDE OF HEART
Receives blood partially depleted of O2, high CO2, pushed into lungs where releases CO2 in exchange for O2
Systemic Circuit
LEFT SIDE OF HEART
Receives newly oxygenated blood from lungs, pumps it to various tissues of body
Cardiac Cycle
period from beginning of one heartbeat to beginning of the next
Systole
contraction phase where blood leaves ventricles
Diastole
relaxation phase when blood fills ventricles
Respiratory System definition
provides means to replace O2 and remove CO2 from blood
Respiratory System is made up of…
nose, nasal cavity, pharynx (throat), larynx (adams apple), trachea (windpipe), bronchi, lungs
Humans breath _____ liters of air per minute at rest and _____ liters per min during exercise
rest- 5-6 liters
exercise- 20-30 liters
Mediastinum
space separating lunges
houses important organs such as heart. aorta, esophagus, part of trachea
What is the only skeletal muscle considered essential for life?
diaphragm
Lymphatic System def
Rids the body of waste
Lymphatic fluid is similar to blood except it contains….
no red blood cells or platelets
4 important functions of Lymphatic System:
- destruction of bacteria present in lymph nodes
- specific immune response that aid in manufacturing antibodies to destroy bacteria
- return of interstitial fluid to bloodstream
- prevention of excessive accumulation of tissue fluid and filtered proteins by drainage into highly permeable lymphatic capillaries in connective tissue
Cardiorespiratory Endurance Def.
capacity of heart and lungs to deliver blood and O2 to working muscles during exercise
ATP=
adenosine triphosphate
Provides energy to drive many processes in living cells
T/F: tidal volume AND breathing increase at onset of exercise
True
Hemoglobin
protein in red blood cells that is specifically adapted to bond with 02 molecules
