chapter 5, 6, 7, 8 extra stuff Flashcards
chambers of the heart
to upper chambers and two lower chambers
ventricles
inferior they pump blood throughout the body (more muscular than atria
atrium
superior act like connecting vessels at the top of the heart
upper chambers
left and right atrium
lower chambers of the heart
left and right ventricle
one way Valves
ensure blood flows in the right direction through the heart and prevent the backflow of blood into the atria when the ventricles contract.
tricuspid valves
Prevents backflow of blood into the right atrium when the right ventricle contracts
Bicuspid Valve
Prevents backflow of blood into left atrium when the left ventricle contracts
Pulmonary Valve
As the ventricles contract, it opens to allow deoxygenated blood to flow to the lungs to be reoxygenated.
Aortic Valve
As the ventricles contract, it opens to allow oxygenated blood to flow throughout the body. It closes as the ventricles relax
the right side of the heart-1st step
Deoxygenated blood returns from the body and enters the Right Atrium through the Superior and Inferior Vena Cava
the right side of the heart- 2nd step
The Right Atrium contracts and pushes blood through the Tricuspid Valve into the Right Ventricle
the right side of the heart 3rd step
Right Ventricle contracts and pumps the blood through the Pulmonary Artery up towards the lungs
the right side of the heart 4th step
Blood becomes oxygenated again in the lungs
the right side of the heart function
receives blood that’s returning from the body- deoxygenated blood
left side of the heart function
receives blood from lungs and sends it out to the body- oxygenated blood
left side of the heart-1st
Oxygenated blood returns from the lungs and enters the Left Atrium via the Pulmonary Veins
left side of the heart-2nd
The Left Atrium contracts and pushes the blood through the Bicuspid Valve into the Left Ventricle.
left side of the heart-3rd
The Left Ventricle contracts and pumps the oxygenated blood out to the body through the Aorta.
functions of blood
distribution, regulation and protection
Distribution- functions of the blood
Transportation of gases, fuels and minerals
Delivering oxygen from the lungs
functions of blood- regulation
-Maintaining equilibrium
-Thermoregulation by absorbing and distributing heat throughout the body
functions of the blood-protection
Protection against dehydration
Carrying cells and antibodies that fight infection
Blood Composition
Red blood cells, White blood cells, Platelets, Plasma
red blood cells
Carry oxygen to working muscles and other cells
White blood cells (leukocytes)
Protect the body from bacteria and viruses,
Platelets (thrombocytes)
Prevent and stop bleeding by forming a temporary plug that helps seals breaks of damaged vessels
Plasma
Transports waste products and assists with their removal from the body
Blood Composition During Exercise- Red blood cells and plasma
respond to increased demands during exercise by transporting gases, fuels, hormones and enzymes as required.
blood composition during exercise-White blood cells and platelets
are less important during exercise, but are vital to ensure our immune system functions properly and minimize fluid loss
blood vessels
Arteries, Capillaries, Veins
arteries
Carry blood away from the heart
Aorta- largest arteries
Strong elastic walls allow transportation of oxygen-rich blood
Capillaries
Where oxygen, nutrients, and wastes are exchanged
Veins
Carry blood back to the heart
Precapillary Sphincters
Controls the blood flow through the capillaries by opening and closing branches.
structure
nose, pharynx, tracea
the function of the respiratory system
Deliver air from the atmosphere into the lungs
Transfer oxygen into the bloodstream
Remove carbon dioxide from the blood
how does the brain control breathing
through the hypalathamus
pulmonary fusion functions
Provide the blood with oxygen before the blood is transported to muscles and other cells within the body
Diffusion
natural movement of gases from area of higher pressure to lower pressure
Pulmonary diffusion
Is the gaseous exchange that occurs at the lungs
Gaseous Exchange
The exchange of gases between blood and air occurs in the alveoli. Oxygen diffuses from the alveoli into blood and carbon dioxide from the blood to the alveoli to be exhaled
Haemoglobin
The protein contained in red blood cells that is responsible for delivery of oxygen to the tissues
exercise decreasing risk of CVD
Coronary heart disease
Stroke
Hypertension