what is systemic circulation
the path of blood between the heart and lungs
the path of blood between pharynx and trachea
the path of blood as it moves from the heart throughout the body and back to the heart
the path of blood as it moves from the head throughout too body and back to the head
Systemic circulation refers to the path of blood as it moves from the heart throughout the body and back to the heart. It includes the distribution of oxygenated blood to all body tissues and the return of deoxygenated blood to the heart.
The human body has four types of tissues. What part of the eye uses muscle tissue for opening and closing movements
retina
cornea
sclera
iris
The iris of the eye uses muscle tissue for opening and closing movements. The iris is responsible for controlling the size of the pupil, regulating the amount of light that enters the eye.
Systemic circulation is the path of blood as it moves from the heart throughout the body and back to the heart.
Systemic circulation is the path of blood as it moves from the heart throughout the body and back to the heart. In more detail, it involves the flow of oxygenated blood from the left side of the heart to the rest of the body, delivering oxygen and nutrients to the tissues. The deoxygenated blood then returns to the heart's right side, where it is pumped to the lungs for oxygenation again.
To understand the concept of systemic circulation, it's helpful to know the basic anatomy of the circulatory system. The heart is divided into four chambers: the left and right atria, and the left and right ventricles. The left atrium receives oxygenated blood from the lungs and passes it to the left ventricle. The left ventricle then pumps the oxygenated blood out of the heart into the aorta, the largest artery in the body.
From the aorta, the oxygenated blood is distributed to various arteries that carry it to different parts of the body, such as organs, muscles, and tissues. Within these organs, the smaller arteries branch into even smaller vessels called arterioles, which further divide into capillaries. Capillaries are tiny, thin-walled blood vessels that allow for the exchange of oxygen, nutrients, and waste products between the blood and surrounding tissues.
In capillary beds, oxygen and nutrients are delivered to the tissues, while waste products, such as carbon dioxide, are picked up. The deoxygenated blood then collects in venules, which merge to form larger veins. These veins gradually increase in size and return the deoxygenated blood back to the heart's right atrium through the superior and inferior vena cava.
Overall, systemic circulation involves the continuous flow of blood from the heart through arteries, capillaries, and veins, supplying oxygen and nutrients to the body's cells and removing waste products. This helps maintain the body's functions and overall health.