heart
it pumps blood throughout your body
what does the heart do?
pinkish-red, firm, and circular, with a small, regular lumen, designed to bounce back when squeezed
what do arteries look like?
throughout the entire body
where are veins located?
Capillaries serve as the functional bridge connecting these small arteries to small veins.
What are arterioles and venules?
throughout the entire body, with its central organ, the heart, positioned in the chest cavity.
where is the system located?
in the middle of you chest behind the sturnum and between the lungs.
where is the heart locted?
carry oxygenated blood away from your heart and to every part of your body
what do arteries do?
blood vessels in the circulatory system that transport blood toward the heart
what are veins?
they are the bodies' smallest blood vessels. at 5-10 micrometers they are even smaller than a strand of human hair
how big are capillaries?
consists of your heart and blood vessels. They use blood to bring your cells what they need and take away what they don’t.
what is the cardiovascular system?
the heart is the only _____ in the cardiovascular system
organ
This largest artery in the body carries oxygenated blood away from the heart to the rest of the body.
what is the aorta?
returning oxygen-poor (deoxygenated) blood from tissues and organs back to the heart. go against gravity, using one-way valves to prevent backflow and muscle contractions to transport blood efficiently.
what do veins do?
the body’s smallest blood vessels, forming extensive networks that connect arterioles (small arteries) to venules (small veins). They are extremely thin-walled (a single layer of endothelial cells), allowing oxygen, nutrients, and waste products to diffuse between blood and tissues.
what are capillaries?
high blood pressure, high cholesterol, arrhythmia, heart attacks, heart valves not working right, heart failure, aneurysm, stroke, Atherosclerosis, heart disease, and vascular diseases.
what are some threats to the system?
100,000 times per day. During the average person’s lifetime, their heart beats more than 2.6 billion times.
how many times does your heart beat?
They are located throughout all body tissues except the hair, nails, and cartilage
where are arteries located?
These are the only veins in the body that carry oxygenated blood.
what are pulmonary veins?
This Latin word for "hair" ,the origin of the name for these tiny, thin-walled vessels.(capillaries)
what is capillus?
move blood around the body, bring oxygen and nutrients to organs, muscles and tissues. And remove waste products like carbon dioxide and your organs’ chemical byproducts.
what is the function of the system?
from the clap of valve leaflets opening and closing.
where does the beating sound come from?
This condition causes a "bulging" or "ballooning" at a weakened spot in an arterial wall.
what is an aneurysm?
These structures are essential in limbs to prevent the backflow of blood due to gravity.
what are valves?
They deliver oxygen and nutrients to tissues and remove waste products like _____
carbon dioxide
If laid end-to-end, they would stretch about 60,000 to 100,000 miles.
how long are the vessels?