A
During a strenuous workout, what signals your body to increase your breathing rate?
The amount of carbon dioxide in your blood
What process is responsible for delivering oxygen and removing carbon dioxide from cells throughout the body?
systemic circulation
What does your pulse measure?
how quickly your heart is beating
Which structure prevents food from entering your lungs when you swallow?
larynx
What do the pulmonary arteries and veins connect the hear to?
lungs
What are the blood vessels that carry blood away from the heart called?
arteries
What is the fluid portion of the blood?
plasma
What forms a blood clot?
platelets
What is the sequence for the pathway of air as it travels through the respiratory system.
nasal cavity, larynx, trachea, bronchus, alveoli
Which blood component provides defense against foreign substances?
white blood cells
what is the pressure of circulating blood against the walls of the arteries called?
blood pressure
What happens when your diaphragm contracts?
you inhale and your chest cavity enlarges
Which cellular structure is missing in red blood cells?
nucleus
The muscular chambers in the heart theater pump blood to the lungs or body are called
ventricles
What is the process by which carbon dioxide and oxygen pass between the alveoli and capillaries?
diffusion
Where are most blood cells formed?
bone marrow
What structure of the lymphatic system recycles red blood cells and produces white blood cells?
spleen
What happens to your diaphragm and rib muscles when you exhale?
they relax
What purpose do valves serve?
prevent blood from flowing in the wrong direction
What happens to your thymus as you age?
it gets smaller
What structure warms and moistens air as it enters the respiratory system?
nasal cavity
capillaries
what system does the lymphatic system rely on to move lymph around in the body?
muscular
What structure contains the vocal cords?
larynx
What makes up more than half of your blood?
plasma
What to lymph nodes do?
filter dead cells, viruses, bacteria and other particles from lymph