1. Artery – The blood channels that transport oxygen-rich blood from the heart to the body’s tissues are known as arteries. Each artery is a muscular tube coated by smooth tissue and has three layers: the intima, the inner layer lined by smooth tissue called endothelium, and the adventitia, the outer layer lined by smooth tissue called endothelium.

2. Capillaries – Blood, nutrients, and oxygen are transported to cells in your organs and bodily systems via microscopic blood capillaries. The smallest blood vessels in your vascular (blood vessel) system are capillaries. The most frequent type of capillary in your body is continuous capillaries.

3. Vena cava – A big vein that delivers blood from other parts of the body to the heart. The superior vena cava and the inferior vena cava are the two portions of the vena cava. Blood is carried from the head, neck, arms, and chest by the superior vena cava.

References:
Continuous Capillaries: Anatomy and Function. (2021). Cleveland Clinic. https://my.clevelandclinic.org/health/body/21788-continuous-capillaries#:~:text=Capillaries%20(CAP%2Duh%2Dlair,of%20capillary%20in%20your%20body.

‌NCI Dictionary of Cancer Terms. (2022). National Cancer Institute; Cancer.gov. https://www.cancer.gov/publications/dictionaries/cancer-terms/def/vena-cava
‌
WebMD. (2012, February 20). Picture of the Arteries. WebMD; WebMD. https://www.webmd.com/heart/picture-of-the-arteries#:~:text=The%20arteries%20are%20the%20blood,a%20smooth%20tissue%20called%20endothelium

‌