### body part | artery:

Aorta
* Most aortas carry blood.
* is an artery

### body part | artery:

Arteriole
* All arterioles connect to an artery on one end and to capillaries on the other.
* Many arterioles show hyaline changes in their walls.
* also penetrate the cortex to serve a medullary capillary bed.
* are arteries
  - blood vessels that dilate and constrict to regulate blood pressure and blood flow
  - just visible to the naked eye
* are small arteries that connect larger arteries with capillaries
  - arteries, and venules are small veins
* are smaller vessels that branch off from the arteries and regulate blood pressure
* control blood flow by dilating and constricting.
* eventually become capillaries, which are very thin and branching.
* have less elastic tissue but have smooth muscle
  - thick smooth muscular walls
* help to regulate blood flow and arterial pressure.
* maintain blood pressure.
* merge into very tiny tubes with thin walls called capillaries.
* regulate the flow of blood to capillary beds.
* run through the hypodermis to the base of the epidermis, branching off every so often.
* serve as control points where adjustments can be made in blood volume distribution.

### body part | artery | arteriole:

Afferent arteriole
* are smaller in diameter than the efferent arterioles.
* arise from the interlobular arteries.
* breaks up into many capillary loops inside the glomerulus.
* has larger diameter than efferent arteriole.
* is larger than efferent one.
* leads to glomerulus, a tuft of capillaries.

Efferent arteriole
* carries away remaining thicker blood.
* leaves glomerulus.

Systemic arteriole
* turn into capillaries.
+ Circulatory system, Systemic circulation: Cardiovascular system
  * The smallest blood vessels are capillaries. Systemic arterioles turn into capillaries. The blood from arterioles goes into the capillaries. There oxygen and nutrients go out of the blood into the tissue around the capillaries. The blood also picks up carbon dioxide and waste from the tissue. The network of capillaries that brings blood to an area is called a 'capillary bed'.

Clogged artery
* Clogged arteries are a major cause of heart attack and stroke
  - seen as the quintessential symptom of an unhealthy modern lifestyle
* Clogged arteries can put a severe strain on the heart and sometimes cause heart attacks or stokes
  - strain on the heart and sometimes cause heart attacks or strokes
  - inhibit the heart's supply of oxygen and nutrients
  - kill people
  - stop an adequate supply of oxygen from reaching the heart

### body part | artery:

Coronary artery
* Coronary arteries are arteries
  - blood vessels that carry oxygen and nutrients to the heart
  - part of hearts
  - vitally important to the human body
  - carry blood to the heart, and blocked coronary arteries can cause heart attacks
  - deliver oxygenated blood, food, etc. to the heart
  - lead to hearts
  - pump blood
  - supply blood and oxygen to the heart
* Coronary arteries supply blood to the heart muscle
  - myocardium and other components of the heart
* Coronary arteries supply the heart muscle with blood
  - take blood from the aorta to the heart muscle
* Most coronary arteries lead to hearts
* Some coronary arteries have acute angles
  - twist angles
* aneurysms after angioplasty and atherectomy.

Healthy artery
* Healthy arteries are soft and elastic
  - usually elastic and have clear, smooth internal surfaces
  - very important for having a healthy body
* Healthy arteries expand to accommodate increased blood flow when the heart needs more oxygen
  - allow the increased flow
  - supplying blood flow to the heart also supply blood flow to the penis
  - widen to get more blood to the body when and where needed