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Circulatory System

Circulatory System is the category for questions about the human circulatory system, including questions about the human heart, arteries, and veins.

500 Questions

What happens after blood travels through the pulmonary semilunar valve?

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After passing through the pulmonary semilunar valve, oxygenated blood is pumped from the right ventricle of the heart into the pulmonary artery and then to the lungs for oxygenation. In the lungs, carbon dioxide is exchanged for oxygen, and the oxygenated blood returns to the heart via the pulmonary veins.

Which animal phylum was the first to have a circulatory system?

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The first animal phylum to have a circulatory system was the Annelida phylum, specifically the earthworm. Annelids have a closed circulatory system composed of blood vessels that transport nutrients and oxygen throughout the body.

List the structures of the circulatory system?

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The structures of the circulatory system include the heart, blood vessels (arteries, veins, and capillaries), and blood. The heart pumps blood through the blood vessels to deliver oxygen and nutrients to cells and remove waste products. The blood vessels transport the blood to and from the heart, while capillaries allow for the exchange of substances between the blood and tissues.

Where do the respiratory and circulatory systems meet in the human body?

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The respiratory and circulatory systems meet at the alveoli in the lungs. Oxygen from the air in the alveoli diffuses into the bloodstream, where it is carried by red blood cells to the rest of the body. Carbon dioxide, a waste product of metabolism, is picked up by the red blood cells and transported back to the lungs to be exhaled.

Is the heart what moves blood through the body?

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No, the heart pumps blood through the body using its strong muscle contractions. The circulatory system is responsible for transporting the blood to all parts of the body, including delivering oxygen and nutrients and removing waste products.

What does 12070 mean in terms of the circulatory system?

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120/70 is a common blood pressure measurement, with the first number (systolic) representing the pressure in the arteries when the heart beats and the second number (diastolic) representing the pressure when the heart rests between beats. A blood pressure reading of 120/70 is considered normal and indicates good circulatory health.

What blood vessel in fetus contain the most oxygen?

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In the fetus, the umbilical vein carries oxygenated blood from the placenta to the fetus, making it the blood vessel with the highest oxygen content. This oxygen-rich blood is essential for fetal development and growth.

How does the circulatory system connect to the nervous system?

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The circulatory system and nervous system are connected through the autonomic nervous system, which regulates heart rate, blood pressure, and blood vessel constriction. Nerves from the autonomic nervous system provide feedback to control these circulatory functions based on the body's needs. Additionally, certain hormones released by the nervous system, such as adrenaline, can directly affect the circulatory system by increasing heart rate and vasoconstriction.

Which blood vessel has a pulse?

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Arteries have a pulse due to the rhythmic contraction of the heart, which creates a pressure wave that can be felt as the pulse in arteries. Veins do not have a pulse as they carry blood back to the heart at a lower pressure.

What is the difference between oxygenated blood and deoxygenated blood?

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Oxygenated blood contains oxygen, which is received from the lungs and carried to tissues throughout the body. Deoxygenated blood lacks oxygen and is returned to the heart after delivering oxygen to the body's tissues.

The blood now rich in oxygen re enters the heart though the pulmonary?

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When blood that is rich in oxygen re enters the heart, the blood enters through the pulmonary valve. The pulmonary valve brings the oxygen rich blood to the pulmonary trunk of the pulmonary artery.

What is the function of the aortic valve?

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The aortic valve controls the flow of blood from the heart's left ventricle to the aorta, which is the body's main artery. It opens to allow blood to be pumped out of the heart and closes to prevent blood from leaking back into the heart.

Examples of Nonvascular?

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Examples of nonvascular plants include mosses, liverworts, and hornworts. These plants lack specialized tissues for transporting water and nutrients, so they are typically found in damp environments where they can absorb water directly from their surroundings. Nonvascular plants reproduce through spores rather than seeds.

What three things make up the circulatory system?

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The circulatory system is composed of the heart, blood vessels, and blood. The heart pumps blood through blood vessels to transport oxygen, nutrients, hormones, and waste products throughout the body.

What is the correct order of the following - 'a' oxygen rich blood arrives at capillaries - 'b' oxygen enters body cells - 'c' heart pumps oxygen rich blood - 'd' oxygen moves through capillary walls?

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Correct order: c) heart pumps oxygen rich blood, a) oxygen rich blood arrives at capillaries, d) oxygen moves through capillary walls, b) oxygen enters body cells.

What does vascular mean?

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Vascular refers to anything related to blood vessels, such as arteries and veins, that transport blood throughout the body. It can also refer to plants and their ability to transport water, nutrients, and other substances through specialized tissues.

A 60 year old is unable to walk 100 yards without experiencing severe pain in his left lower leg He was told to have the sympathetic nerves of the the vasomotor tone severed How does surgery help?

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Severing the sympathetic nerves can help by interrupting the pain signals traveling to the brain from the left lower leg. This procedure can reduce the perception of pain in the affected area, allowing the individual to walk without experiencing severe pain.

What are tiny blood vessels called?

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Tiny blood vessels are called capillaries. They have thin walls that allow for the exchange of oxygen, nutrients, and waste products between the blood and surrounding tissues.

What is the air mixture in scuba?

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The air mixture in scuba diving tanks is typically compressed air, which consists of about 21% oxygen and 79% nitrogen. This mixture allows divers to breathe at depth without experiencing adverse effects of high pressure.

What happens if disease-causing bacteria get through a break in the skin and enter the circulatory system?

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If the body's immune mechanism is not capable of fighting then the bacteria produces disease.

Which human blood group lacks proteins in the red blood cells?

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The human blood group that lacks proteins in the red blood cells is the O blood group. This means that individuals with type O blood do not have the A or B antigens on their red blood cells.

How are red and white blood cells alike?

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Red and white blood cells are both types of cells found in the blood. Red blood cells are responsible for carrying oxygen to tissues, while white blood cells play a key role in the immune system by defending the body against infections and foreign invaders. Both types of cells are produced in the bone marrow.

Why do you need red blood cells?

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Red blood cells are essential because they transport oxygen from the lungs to the body's tissues and organs. They contain hemoglobin, a protein that binds to oxygen and carries it throughout the body. Without enough red blood cells, the body cannot receive the oxygen it needs to function properly.

What sort of circulation system does a fungi have?

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Fungi have a simple circulation system that relies on the diffusion of nutrients, water, and enzymes through their body. This system allows them to absorb and distribute nutrients efficiently in order to grow and reproduce.