Blood vessels - structure and function (Arterioles (Smallest "…
Blood vessels - structure and function
Carries blood away from the heart.
Elastic blood vessel.
Two main types of arteries
Carries blood from the heart to the lungs. Then it picks up oxygen.
Deliver blood to the rest of the body.
Main + largest artery of the body is the aorta. Originates from the heart. Branches out into smaller arteries then supplies blood to the head region (brachiocephalic artery) to the heart (coronary arteries) and to lower parts of the body.
Carries blood towards the heart.
Carry oxygen depleted blood to the atrium of the heart.
Transport oxygenated blood to the upper chamber of the heart.
Deoxygenated blood is transported by most veins. Collected from capillaries by venules.
Smallest "resistance arteries".
Thick tunica media, little compliance.
Diameter is controlled by local factors (intrinsic) + sympathetic division (extrinsic) + long term factors (hormones).
Metarterioles - upstream of capillary beds.
precapillary sphincters - controls blood reaching capillary bed.
The minute vessels collect blood from the capillary plexuses to join together to form veins.
From the blood stream to the tissues, allows diffusion of different substances.
Capillary bed - high density,. Groups of capillaries forming a network.
To parts of the body, development of capillary network.
Increasing the number + density of capillaries by aerobic training which improves capillarization of the heart + skeletal muscles.