HBS SA 3.1

What are the tasks and relative width of vein, Capillaries, and arteries

What are the tasks and relative width of vein, Capillaries, and arteries

veins- thinner vessels due to lack of pressure, takes blood from the body to the heart, low pressure

capillaries- vessels between arteries and veins

• distributes gases w/ in tissues o2+co2

• thin are porous to allow for exchange

arteries

• thicker vessels to handle pressure

• takes blood away from heart and to rest of body

how do you calculate vital capacity and total lung capacity

vital

• tidal volume+inspiratory reserve volume + expiratory reserve volume

total lung capacity

• vital capacity+residual volume

how do you calculate ABI and what are the causes of obstructions?

take higher of right ankle pressure/ higher arm pressure

then overall ABI is the lower of the right or left side.

.0- .4 = severe

.41-.7= moderate

.71-.9= mild

above .9 normal

possible obstructions can include atherosclerosis which is fatty build up in the arteries which leads to less blood flow to those areas of the body

What is the purpose of a spirometry test?

asses how well you lungs work based on measuring how much air you inhale +exhale and how quickly you exhale . this can be used to then diagnose other conditions like asthma and COPD

How does blood get reoxygenated

Deoxygenated blood enters the heart from the vena cavas. Vena cavas empty blood into the right atrium. Blood flows into the right ventricle. It then flows into the pulmonary artery before being delivered to the lungs.

when we breath in, air travels through trachea, then divides in the bronchi. it then further divides into the bronchioles, from there it reaches the alveoli which is the site of the gas exchange. the alveoli are made up of one layer of very thin cells and situated closely to the capillaries which facilitates the carbon dioxide leaving the blood and the oxygen leaving the lungs to the blood.

Once fully saturated with oxygen, the blood is transported via the pulmonary vein into the left atrium and into the left ventricle. With a powerful contraction, the left ventricle expels oxygen-rich blood into the aorta where it then delivers the oxygenated blood to the body.