Respiratory System

Are veins bigger than arteries?
The walls of veins have the same three layers as the arteries. Although all the layers are present, there is less smooth muscle and connective tissue. This makes the walls of veins thinner than those of arteries, which is related to the fact that blood in the veins has less pressure than in the…[Read more]

Do veins have valves?
Veins have valves to stop blood from flowing backwards.

2 tyes of veins:
Pulmonary veins. The pulmonary circuit carries deoxygenated blood from your heart to your lungs. …
Systemic veins. The systemic circuit carries deoxygenated blood from the rest of the body back to your heart, where it then enters the pulmonary circuit for oxygen.

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Why are veins bigger than arteries?

Your arteries are thicker and stretchier to be able to handle the higher pressure of blood moving through them. Your veins are thinner and less stretchy. This structure helps veins move higher amounts of blood over a longer time than arteries.

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Similarities between Arteries and Veins

Arteries and veins have walls that share a common overall structure that consists of three layers: the tunica intima, tunica media, and tunica adventitia. The inner layer or tunica intima is lined with a single layer of a specialized epithelium called the endothelium, which acts as a semipermeable…[Read more]

Differences between the Arteries and Veins

Function:
Arteries involved in carrying oxygenated blood except for pulmonary arteries.
Veins involved in carrying deoxygenated blood except for pulmonary veins.

Walls:
Arteries consists of three distinct layers, which are rigid, thicker and highly muscular.
Veins consists of three distinct layers,…[Read more]

Anatomy, Head and Neck, Oral Cavity (Mouth) – StatPearls – NCBI Bookshelf

https://www.ncbi.nlm.nih.gov/books/NBK545271/#:~:text=The%20mouth%20not%20only%20plays,pieces%20small%20enough%20for%20digestion.

The oral cavity, or more commonly known as the mouth or buccal cavity, serves as the first portion of the digestive…

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Digestive System: Function, Organs & Anatomy

https://my.clevelandclinic.org/health/body/7041-digestive-system#:~:text=Your%20digestive%20system%20breaks%20down,energy%2C%20growth%20and%20repairing%20cells.

Your digestive system is a sophisticated machine that absorbs the food you eat and transforms it into energy and…

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Nervous system | Definition, Function, Structure, & Facts | Britannica

https://www.britannica.com/science/nervous-system

Nervous system, organized group of cells specialized for the conduction of electrochemical stimuli from sensory receptors. The nervous system allows for the almost instantaneous transmission of…

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